Maw
Old English maga (in the sense ‘stomach’), of Germanic origin; related to Dutch maag and German Magen ‘stomach’.
wiktionary
From Middle English mawe, maghe, maȝe, from Old English maga(“stomach; maw”), from Proto-Germanic *magô(“belly; stomach”), from Proto-Indo-European *mak-, *maks-(“bag, bellows, belly”).
By shortening of mother
See mew(“a gull”), måke(“a gull”)
etymonline
maw (n.)
Middle English maue, from Old English maga "stomach" (of men and animals, including fish and birds; in Modern English only of animals unless insultingly of humans), from Proto-Germanic *magan- "bag, stomach" (source also of Old Frisian maga, Old Norse magi, Danish mave, Middle Dutch maghe, Dutch maag, Old High German mago, German Magen "stomach"), from PIE *mak- "leather bag" (source also of Welsh megin "bellows," Lithuanian makas, Old Church Slavonic mošina "bag, pouch"). Meaning "throat, gullet" is from late 14c. Metaphoric of voracity from late 14c.
