Man pages matching name xwin_set_window_name in section 3alleg4:

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