diff --git a/libs/libnx/nxfonts/Make.defs b/libs/libnx/nxfonts/Make.defs
index 733ae8cebf..3f55b1bc48 100644
--- a/libs/libnx/nxfonts/Make.defs
+++ b/libs/libnx/nxfonts/Make.defs
@@ -166,11 +166,11 @@ CSRCS += nxfonts_bitmaps_x11-misc-fixed-6x13.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_6X13B),y)
-CSRCS += nxfonts_bitmaps_x11-misc-fixed-6x13B.c
+CSRCS += nxfonts_bitmaps_x11-misc-fixed-6x13b.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_6X13O),y)
-CSRCS += nxfonts_bitmaps_x11-misc-fixed-6x13O.c
+CSRCS += nxfonts_bitmaps_x11-misc-fixed-6x13o.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_7X13),y)
@@ -178,11 +178,11 @@ CSRCS += nxfonts_bitmaps_x11-misc-fixed-7x13.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_7X13B),y)
-CSRCS += nxfonts_bitmaps_x11-misc-fixed-7x13B.c
+CSRCS += nxfonts_bitmaps_x11-misc-fixed-7x13b.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_7X13O),y)
-CSRCS += nxfonts_bitmaps_x11-misc-fixed-7x13O.c
+CSRCS += nxfonts_bitmaps_x11-misc-fixed-7x13o.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_7X14),y)
@@ -190,7 +190,7 @@ CSRCS += nxfonts_bitmaps_x11-misc-fixed-7x14.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_7X14B),y)
-CSRCS += nxfonts_bitmaps_x11-misc-fixed-7x14B.c
+CSRCS += nxfonts_bitmaps_x11-misc-fixed-7x14b.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_8X13),y)
@@ -198,11 +198,11 @@ CSRCS += nxfonts_bitmaps_x11-misc-fixed-8x13.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_8X13B),y)
-CSRCS += nxfonts_bitmaps_x11-misc-fixed-8x13B.c
+CSRCS += nxfonts_bitmaps_x11-misc-fixed-8x13b.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_8X13O),y)
-CSRCS += nxfonts_bitmaps_x11-misc-fixed-8x13O.c
+CSRCS += nxfonts_bitmaps_x11-misc-fixed-8x13o.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_9X15),y)
@@ -210,7 +210,7 @@ CSRCS += nxfonts_bitmaps_x11-misc-fixed-9x15.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_9X15B),y)
-CSRCS += nxfonts_bitmaps_x11-misc-fixed-9x15B.c
+CSRCS += nxfonts_bitmaps_x11-misc-fixed-9x15b.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_9X18),y)
@@ -218,7 +218,7 @@ CSRCS += nxfonts_bitmaps_x11-misc-fixed-9x18.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_9X18B),y)
-CSRCS += nxfonts_bitmaps_x11-misc-fixed-9x18B.c
+CSRCS += nxfonts_bitmaps_x11-misc-fixed-9x18b.c
 endif
 
 ifeq ($(CONFIG_NXFONT_X11_MISC_FIXED_10X20),y)
diff --git a/libs/libnx/nxfonts/Makefile.sources b/libs/libnx/nxfonts/Makefile.sources
index 3cfc1d7c26..77779992f1 100644
--- a/libs/libnx/nxfonts/Makefile.sources
+++ b/libs/libnx/nxfonts/Makefile.sources
@@ -223,12 +223,12 @@ endif
 
 ifeq ($(NXFONTS_FONTID),28)
 NXFONTS_PREFIX := g_x11_misc_fixed_6x13B_
-GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-6x13B.c
+GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-6x13b.c
 endif
 
 ifeq ($(NXFONTS_FONTID),29)
 NXFONTS_PREFIX := g_x11_misc_fixed_6x13O_
-GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-6x13O.c
+GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-6x13o.c
 endif
 
 ifeq ($(NXFONTS_FONTID),30)
@@ -238,12 +238,12 @@ endif
 
 ifeq ($(NXFONTS_FONTID),31)
 NXFONTS_PREFIX := g_x11_misc_fixed_7x13B_
-GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-7x13B.c
+GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-7x13b.c
 endif
 
 ifeq ($(NXFONTS_FONTID),32)
 NXFONTS_PREFIX := g_x11_misc_fixed_7x13O_
-GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-7x13O.c
+GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-7x13o.c
 endif
 
 ifeq ($(NXFONTS_FONTID),33)
@@ -253,7 +253,7 @@ endif
 
 ifeq ($(NXFONTS_FONTID),34)
 NXFONTS_PREFIX := g_x11_misc_fixed_7x14B_
-GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-7x14B.c
+GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-7x14b.c
 endif
 
 ifeq ($(NXFONTS_FONTID),35)
@@ -263,12 +263,12 @@ endif
 
 ifeq ($(NXFONTS_FONTID),36)
 NXFONTS_PREFIX := g_x11_misc_fixed_8x13B_
-GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-8x13B.c
+GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-8x13b.c
 endif
 
 ifeq ($(NXFONTS_FONTID),37)
 NXFONTS_PREFIX := g_x11_misc_fixed_8x13O_
-GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-8x13O.c
+GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-8x13o.c
 endif
 
 ifeq ($(NXFONTS_FONTID),38)
@@ -278,7 +278,7 @@ endif
 
 ifeq ($(NXFONTS_FONTID),39)
 NXFONTS_PREFIX := g_x11_misc_fixed_9x15B_
-GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-9x15B.c
+GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-9x15b.c
 endif
 
 ifeq ($(NXFONTS_FONTID),40)
@@ -288,7 +288,7 @@ endif
 
 ifeq ($(NXFONTS_FONTID),41)
 NXFONTS_PREFIX := g_x11_misc_fixed_9x18B_
-GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-9x18B.c
+GEN_CSRC = nxfonts_bitmaps_x11-misc-fixed-9x18b.c
 endif
 
 ifeq ($(NXFONTS_FONTID),42)
diff --git a/libs/libnx/nxfonts/nxfonts_bitmaps.c b/libs/libnx/nxfonts/nxfonts_bitmaps.c
index 01ce77a336..581b41bdc9 100644
--- a/libs/libnx/nxfonts/nxfonts_bitmaps.c
+++ b/libs/libnx/nxfonts/nxfonts_bitmaps.c
@@ -101,33 +101,33 @@
 #elif NXFONTS_FONTID == 27
 #  include "nxfonts_x11-misc-fixed-6x13.h"
 #elif NXFONTS_FONTID == 28
-#  include "nxfonts_x11-misc-fixed-6x13B.h"
+#  include "nxfonts_x11-misc-fixed-6x13b.h"
 #elif NXFONTS_FONTID == 29
-#  include "nxfonts_x11-misc-fixed-6x13O.h"
+#  include "nxfonts_x11-misc-fixed-6x13o.h"
 #elif NXFONTS_FONTID == 30
 #  include "nxfonts_x11-misc-fixed-7x13.h"
 #elif NXFONTS_FONTID == 31
-#  include "nxfonts_x11-misc-fixed-7x13B.h"
+#  include "nxfonts_x11-misc-fixed-7x13b.h"
 #elif NXFONTS_FONTID == 32
-#  include "nxfonts_x11-misc-fixed-7x13O.h"
+#  include "nxfonts_x11-misc-fixed-7x13o.h"
 #elif NXFONTS_FONTID == 33
 #  include "nxfonts_x11-misc-fixed-7x14.h"
 #elif NXFONTS_FONTID == 34
-#  include "nxfonts_x11-misc-fixed-7x14B.h"
+#  include "nxfonts_x11-misc-fixed-7x14b.h"
 #elif NXFONTS_FONTID == 35
 #  include "nxfonts_x11-misc-fixed-8x13.h"
 #elif NXFONTS_FONTID == 36
-#  include "nxfonts_x11-misc-fixed-8x13B.h"
+#  include "nxfonts_x11-misc-fixed-8x13b.h"
 #elif NXFONTS_FONTID == 37
-#  include "nxfonts_x11-misc-fixed-8x13O.h"
+#  include "nxfonts_x11-misc-fixed-8x13o.h"
 #elif NXFONTS_FONTID == 38
 #  include "nxfonts_x11-misc-fixed-9x15.h"
 #elif NXFONTS_FONTID == 39
-#  include "nxfonts_x11-misc-fixed-9x15B.h"
+#  include "nxfonts_x11-misc-fixed-9x15b.h"
 #elif NXFONTS_FONTID == 40
 #  include "nxfonts_x11-misc-fixed-9x18.h"
 #elif NXFONTS_FONTID == 41
-#  include "nxfonts_x11-misc-fixed-9x18B.h"
+#  include "nxfonts_x11-misc-fixed-9x18b.h"
 #elif NXFONTS_FONTID == 42
 #  include "nxfonts_x11-misc-fixed-10x20.h"
 #elif NXFONTS_FONTID == 43
diff --git a/libs/libnx/nxfonts/nxfonts_getfont.c b/libs/libnx/nxfonts/nxfonts_getfont.c
index 2b2b8dd483..ecb3ead333 100644
--- a/libs/libnx/nxfonts/nxfonts_getfont.c
+++ b/libs/libnx/nxfonts/nxfonts_getfont.c
@@ -179,11 +179,11 @@ extern const struct nx_fontpackage_s g_x11_misc_fixed_6x13_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_6X13B
-extern const struct nx_fontpackage_s g_x11_misc_fixed_6x13B_package;
+extern const struct nx_fontpackage_s g_x11_misc_fixed_6x13b_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_6X13O
-extern const struct nx_fontpackage_s g_x11_misc_fixed_6x13O_package;
+extern const struct nx_fontpackage_s g_x11_misc_fixed_6x13o_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_7X13
@@ -191,11 +191,11 @@ extern const struct nx_fontpackage_s g_x11_misc_fixed_7x13_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_7X13B
-extern const struct nx_fontpackage_s g_x11_misc_fixed_7x13B_package;
+extern const struct nx_fontpackage_s g_x11_misc_fixed_7x13b_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_7X13O
-extern const struct nx_fontpackage_s g_x11_misc_fixed_7x13O_package;
+extern const struct nx_fontpackage_s g_x11_misc_fixed_7x13o_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_7X14
@@ -203,7 +203,7 @@ extern const struct nx_fontpackage_s g_x11_misc_fixed_7x14_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_7X14B
-extern const struct nx_fontpackage_s g_x11_misc_fixed_7x14B_package;
+extern const struct nx_fontpackage_s g_x11_misc_fixed_7x14b_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_8X13
@@ -211,11 +211,11 @@ extern const struct nx_fontpackage_s g_x11_misc_fixed_8x13_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_8X13B
-extern const struct nx_fontpackage_s g_x11_misc_fixed_8x13B_package;
+extern const struct nx_fontpackage_s g_x11_misc_fixed_8x13b_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_8X13O
-extern const struct nx_fontpackage_s g_x11_misc_fixed_8x13O_package;
+extern const struct nx_fontpackage_s g_x11_misc_fixed_8x13o_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_9X15
@@ -223,7 +223,7 @@ extern const struct nx_fontpackage_s g_x11_misc_fixed_9x15_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_9X15B
-extern const struct nx_fontpackage_s g_x11_misc_fixed_9x15B_package;
+extern const struct nx_fontpackage_s g_x11_misc_fixed_9x15b_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_9X18
@@ -231,7 +231,7 @@ extern const struct nx_fontpackage_s g_x11_misc_fixed_9x18_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_9X18B
-extern const struct nx_fontpackage_s g_x11_misc_fixed_9x18B_package;
+extern const struct nx_fontpackage_s g_x11_misc_fixed_9x18b_package;
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_10X20
@@ -367,11 +367,11 @@ static FAR const struct nx_fontpackage_s *g_fontpackages[] =
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_6X13B
-  &g_x11_misc_fixed_6x13B_package,
+  &g_x11_misc_fixed_6x13b_package,
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_6X13O
-  &g_x11_misc_fixed_6x13O_package,
+  &g_x11_misc_fixed_6x13o_package,
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_7X13
@@ -379,11 +379,11 @@ static FAR const struct nx_fontpackage_s *g_fontpackages[] =
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_7X13B
-  &g_x11_misc_fixed_7x13B_package,
+  &g_x11_misc_fixed_7x13b_package,
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_7X13O
-  &g_x11_misc_fixed_7x13O_package,
+  &g_x11_misc_fixed_7x13o_package,
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_7X14
@@ -391,7 +391,7 @@ static FAR const struct nx_fontpackage_s *g_fontpackages[] =
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_7X14B
-  &g_x11_misc_fixed_7x14B_package,
+  &g_x11_misc_fixed_7x14b_package,
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_8X13
@@ -399,11 +399,11 @@ static FAR const struct nx_fontpackage_s *g_fontpackages[] =
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_8X13B
-  &g_x11_misc_fixed_8x13B_package,
+  &g_x11_misc_fixed_8x13b_package,
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_8X13O
-  &g_x11_misc_fixed_8x13O_package,
+  &g_x11_misc_fixed_8x13o_package,
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_9X15
@@ -411,7 +411,7 @@ static FAR const struct nx_fontpackage_s *g_fontpackages[] =
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_9X15B
-  &g_x11_misc_fixed_9x15B_package,
+  &g_x11_misc_fixed_9x15b_package,
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_9X18
@@ -419,7 +419,7 @@ static FAR const struct nx_fontpackage_s *g_fontpackages[] =
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_9X18B
-  &g_x11_misc_fixed_9x18B_package,
+  &g_x11_misc_fixed_9x18b_package,
 #endif
 
 #ifdef CONFIG_NXFONT_X11_MISC_FIXED_10X20
diff --git a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13B.h b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13b.h
similarity index 100%
rename from libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13B.h
rename to libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13b.h
diff --git a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13O.h b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13o.h
similarity index 99%
rename from libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13O.h
rename to libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13o.h
index c3612bcbc1..9253a8cb8f 100644
--- a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13O.h
+++ b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13o.h
@@ -1,5 +1,5 @@
 /****************************************************************************
- * libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13O.h
+ * libs/libnx/nxfonts/nxfonts_x11-misc-fixed-6x13o.h
  *
  *   Copyright (C) 2014 Pierre-Noel Bouteville. All rights reserved.
  *   Author: Pierre-Noel Bouteville <pnb990@gmail.com>
diff --git a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x13B.h b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x13b.h
similarity index 100%
rename from libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x13B.h
rename to libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x13b.h
diff --git a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x13O.h b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x13o.h
similarity index 99%
rename from libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x13O.h
rename to libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x13o.h
index ae4b02532c..974fd98ccc 100644
--- a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x13O.h
+++ b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x13o.h
@@ -1,5 +1,5 @@
 /****************************************************************************
- * libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x130.h
+ * libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x13o.h
  *
  *   Copyright (C) 2014 Pierre-Noel Bouteville. All rights reserved.
  *   Author: Pierre-Noel Bouteville <pnb990@gmail.com>
diff --git a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x14B.h b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x14b.h
similarity index 100%
rename from libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x14B.h
rename to libs/libnx/nxfonts/nxfonts_x11-misc-fixed-7x14b.h
diff --git a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13B.h b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13b.h
similarity index 100%
rename from libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13B.h
rename to libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13b.h
diff --git a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13O.h b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13o.h
similarity index 99%
rename from libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13O.h
rename to libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13o.h
index a36925567b..999fb8af8c 100644
--- a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13O.h
+++ b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13o.h
@@ -1,5 +1,5 @@
 /****************************************************************************
- * libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13O.h
+ * libs/libnx/nxfonts/nxfonts_x11-misc-fixed-8x13o.h
  *
  *   Copyright (C) 2014 Pierre-Noel Bouteville. All rights reserved.
  *   Author: Pierre-Noel Bouteville <pnb990@gmail.com>
diff --git a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x15B.h b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x15b.h
similarity index 100%
rename from libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x15B.h
rename to libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x15b.h
diff --git a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x18B.h b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x18b.h
similarity index 99%
rename from libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x18B.h
rename to libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x18b.h
index 71f7137919..7c48f03f5b 100644
--- a/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x18B.h
+++ b/libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x18b.h
@@ -1,5 +1,5 @@
 /****************************************************************************
- * libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x18B.h
+ * libs/libnx/nxfonts/nxfonts_x11-misc-fixed-9x18b.h
  *
  *   Copyright (C) 2014 Pierre-Noel Bouteville. All rights reserved.
  *   Author: Pierre-Noel Bouteville <pnb990@gmail.com>