Man pages matching name libnss_myhostname.so.2 in section 8:

libnss_myhostname.so.2.8.en	debian 10 / libnss-myhostname
libnss_myhostname.so.2.8.en	debian 11 / libnss-myhostname
libnss_myhostname.so.2.8.de	debian 11 / manpages-de
libnss_myhostname.so.2.8.en	debian 12 / libnss-myhostname
libnss_myhostname.so.2.8.de	debian 12 / manpages-de