- Source: Mongillo
Mongillo is a surname of Italian origin, a variant of Mongelli, a patronymic surname from the personal name Moncio, meaning "little monk". Notable people with the surname include:
Aviva Mongillo (born 1998), Canadian singer and actress
Casey Mongillo (born 1987), American voice actor
Michael Mongillo (fl. 1997–present), American film director, screenwriter and producer