Man pages matching name wmempcpy in section 3:

wmempcpy.3.en	debian 10 / manpages-dev
wmempcpy.3.ja	debian 10 / manpages-ja-dev
wmempcpy.3.en	debian 11 / manpages-dev
wmempcpy.3.fr	debian 11 / manpages-fr-dev
wmempcpy.3.ja	debian 11 / manpages-ja-dev
wmempcpy.3.en	debian 12 / manpages-dev
wmempcpy.3.fr	debian 12 / manpages-fr-dev
wmempcpy.3.ja	debian 12 / manpages-ja-dev
wmempcpy.3.ru	debian 12 / manpages-ru-dev