Man pages matching name uconvert_toascii in section 3alleg4:

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