/etc/X11/ is in xvkbd 3.0-1.
This file is owned by root:root, with mode 0o755.
..
/etc/X11/app-defaults/
/etc/X11/app-defaults/XVkbd
/etc/X11/app-defaults/XVkbd-belgian
/etc/X11/app-defaults/XVkbd-common
/etc/X11/app-defaults/XVkbd-danish
/etc/X11/app-defaults/XVkbd-fitaly
/etc/X11/app-defaults/XVkbd-french
/etc/X11/app-defaults/XVkbd-french2
/etc/X11/app-defaults/XVkbd-german
/etc/X11/app-defaults/XVkbd-greek
/etc/X11/app-defaults/XVkbd-hebrew
/etc/X11/app-defaults/XVkbd-icelandic
/etc/X11/app-defaults/XVkbd-italian
/etc/X11/app-defaults/XVkbd-jisx6002
/etc/X11/app-defaults/XVkbd-jisx6004
/etc/X11/app-defaults/XVkbd-korean
/etc/X11/app-defaults/XVkbd-latin1
/etc/X11/app-defaults/XVkbd-norwegian
/etc/X11/app-defaults/XVkbd-portuguese
/etc/X11/app-defaults/XVkbd-russian
/etc/X11/app-defaults/XVkbd-slovene
/etc/X11/app-defaults/XVkbd-small
/etc/X11/app-defaults/XVkbd-spanish
/etc/X11/app-defaults/XVkbd-swedish
/etc/X11/app-defaults/XVkbd-swissgerman
/etc/X11/app-defaults/XVkbd-turkish
/etc/X11/app-defaults/XVkbd-uk