Man pages matching name iswupper in section 3:

iswupper.3.en	debian 10 / manpages-dev
iswupper.3.es	debian 10 / manpages-es
iswupper.3.ja	debian 10 / manpages-ja-dev
iswupper.3.pt	debian 10 / manpages-pt-dev
iswupper.3.en	debian 11 / manpages-dev
iswupper.3.es	debian 11 / manpages-es-dev
iswupper.3.fr	debian 11 / manpages-fr-dev
iswupper.3.ja	debian 11 / manpages-ja-dev
iswupper.3.pt	debian 11 / manpages-pt-dev
iswupper.3.en	debian 12 / manpages-dev
iswupper.3.es	debian 12 / manpages-es-dev
iswupper.3.fr	debian 12 / manpages-fr-dev
iswupper.3.ja	debian 12 / manpages-ja-dev
iswupper.3.ru	debian 12 / manpages-ru-dev