Man pages matching name swapon in section 8:

swapon.8.es	debian 10 / manpages-es-extra
swapon.8.ja	debian 10 / manpages-ja
swapon.8.pl	debian 10 / manpages-pl
swapon.8.tr	debian 10 / manpages-tr
swapon.8.zh_CN	debian 10 / manpages-zh
swapon.8.zh_TW	debian 10 / manpages-zh
swapon.8.en	debian 10 / mount
swapon.8.de	debian 11 / manpages-de
swapon.8.fr	debian 11 / manpages-fr
swapon.8.ja	debian 11 / manpages-ja
swapon.8.pl	debian 11 / manpages-pl
swapon.8.tr	debian 11 / manpages-tr
swapon.8.zh_CN	debian 11 / manpages-zh
swapon.8.zh_TW	debian 11 / manpages-zh
swapon.8.en	debian 11 / mount
swapon.8.de	debian 12 / manpages-de
swapon.8.ja	debian 12 / manpages-ja
swapon.8.pl	debian 12 / manpages-pl
swapon.8.tr	debian 12 / manpages-tr
swapon.8.uk	debian 12 / manpages-uk
swapon.8.zh_CN	debian 12 / manpages-zh
swapon.8.zh_TW	debian 12 / manpages-zh
swapon.8.en	debian 12 / mount