Man pages matching name utmpname in section 3:

utmpname.3.de	debian 10 / manpages-de-dev
utmpname.3.en	debian 10 / manpages-dev
utmpname.3.es	debian 10 / manpages-es
utmpname.3.ja	debian 10 / manpages-ja-dev
utmpname.3.pl	debian 10 / manpages-pl-dev
utmpname.3.de	debian 11 / manpages-de-dev
utmpname.3.en	debian 11 / manpages-dev
utmpname.3.fr	debian 11 / manpages-fr-dev
utmpname.3.ja	debian 11 / manpages-ja-dev
utmpname.3.pl	debian 11 / manpages-pl-dev
utmpname.3.de	debian 12 / manpages-de-dev
utmpname.3.en	debian 12 / manpages-dev
utmpname.3.fr	debian 12 / manpages-fr-dev
utmpname.3.ja	debian 12 / manpages-ja-dev
utmpname.3.pl	debian 12 / manpages-pl-dev