Man pages matching name sane-umax_pp in section 5:

sane-umax_pp.5.en	debian 10 / sane-utils
sane-umax_pp.5.en	debian 11 / sane-utils
sane-umax_pp.5.en	debian 12 / libsane-common
sane-umax_pp.5.de	debian 12 / manpages-de