Man pages matching name glib-genmarshal in section 1:

glib-genmarshal.1.en	debian 10 / libglib2.0-dev-bin
glib-genmarshal.1.en	debian 11 / libglib2.0-dev-bin
glib-genmarshal.1.en	debian 12 / libglib2.0-dev-bin