Man pages matching name register_datafile_object in section 3alleg4:

register_datafile_object.3alleg4.en	debian 10 / allegro4-doc
register_datafile_object.3alleg4.en	debian 11 / allegro4-doc
register_datafile_object.3alleg4.en	debian 12 / allegro4-doc
register_datafile_object.3alleg4.en	debian 13 / allegro4-doc