Man pages matching name yphelper in section 8:

yphelper.8.ja	debian 10 / manpages-ja
yphelper.8.en	debian 10 / nis
yphelper.8.ja	debian 11 / manpages-ja
yphelper.8.en	debian 11 / ypserv
yphelper.8.ja	debian 12 / manpages-ja
yphelper.8.en	debian 12 / ypserv