Origin of MonaIrish Muadhnait, diminutive of muadh, noble
- Cercopithecus mona, a West African monkey.
From Spanish mona (“monkey”)
Anglicized form Gaelic Muadhnait, from muadh "noble". In northern Europe, where the name is much more popular, Mona is interpreted as a diminutive of Monika or, rarely, of Ramona, and sometimes associated with the title of da Vinci's painting Mona (=madonna) Lisa.