Man pages matching name hostname in section 1:

hostname.1.en	debian 10 / hostname
hostname.1.de	debian 10 / manpages-de
hostname.1.es	debian 10 / manpages-es-extra
hostname.1.hu	debian 10 / manpages-hu
hostname.1.ja	debian 10 / manpages-ja
hostname.1.pl	debian 10 / manpages-pl
hostname.1.tr	debian 10 / manpages-tr
hostname.1.zh_CN	debian 10 / manpages-zh
hostname.1.zh_TW	debian 10 / manpages-zh
hostname.1.en	debian 11 / hostname
hostname.1.de	debian 11 / manpages-de
hostname.1.es	debian 11 / manpages-es
hostname.1.hu	debian 11 / manpages-hu
hostname.1.ja	debian 11 / manpages-ja
hostname.1.pl	debian 11 / manpages-pl
hostname.1.tr	debian 11 / manpages-tr
hostname.1.zh_CN	debian 11 / manpages-zh
hostname.1.zh_TW	debian 11 / manpages-zh
hostname.1.en	debian 12 / hostname
hostname.1.de	debian 12 / manpages-de
hostname.1.es	debian 12 / manpages-es
hostname.1.ja	debian 12 / manpages-ja
hostname.1.pl	debian 12 / manpages-pl
hostname.1.tr	debian 12 / manpages-tr
hostname.1.zh_CN	debian 12 / manpages-zh
hostname.1.zh_TW	debian 12 / manpages-zh