Man pages matching name bswap in section 3:

bswap.3.en	debian 10 / manpages-dev
bswap.3.en	debian 11 / manpages-dev
bswap.3.en	debian 12 / manpages-dev
bswap.3.fr	debian 12 / manpages-fr-dev
bswap.3.en	debian 13 / manpages-dev
bswap.3.fr	debian 13 / manpages-fr-dev
bswap.3.ro	debian 13 / manpages-ro-dev