Man pages matching name nicknames in section 5:

nicknames.5.ja	debian 10 / manpages-ja
nicknames.5.en	debian 10 / nis
nicknames.5.ja	debian 11 / manpages-ja
nicknames.5.en	debian 11 / yp-tools
nicknames.5.ja	debian 12 / manpages-ja
nicknames.5.en	debian 12 / yp-tools