Man pages matching name basename in section 3:

baseName.3.en	debian 10 / libcdk5-dev
basename.3.en	debian 10 / manpages-dev
basename.3.es	debian 10 / manpages-es
basename.3.ja	debian 10 / manpages-ja-dev
basename.3.pl	debian 10 / manpages-pl-dev
basename.3.zh_CN	debian 10 / manpages-zh
basename.3.zh_TW	debian 10 / manpages-zh
baseName.3.en	debian 11 / libcdk5-dev
basename.3.en	debian 11 / manpages-dev
basename.3.es	debian 11 / manpages-es-dev
basename.3.ja	debian 11 / manpages-ja-dev
basename.3.pl	debian 11 / manpages-pl-dev
basename.3.zh_CN	debian 11 / manpages-zh
basename.3.zh_TW	debian 11 / manpages-zh
baseName.3.en	debian 12 / libcdk5-dev
basename.3.en	debian 12 / manpages-dev
basename.3.es	debian 12 / manpages-es-dev
basename.3.fr	debian 12 / manpages-fr-dev
basename.3.ja	debian 12 / manpages-ja-dev
basename.3.pl	debian 12 / manpages-pl-dev
basename.3.ru	debian 12 / manpages-ru-dev
basename.3.zh_CN	debian 12 / manpages-zh
basename.3.zh_TW	debian 12 / manpages-zh