Rio Family History
Rio Surname Meaning
Spanish (Río) Portuguese and Italian: from río rio ‘river brook’ (from Latin rivus) applied either as a topographic name or as a habitational name from a place called with this word. Compare Del Rio.
Breton (mainly Morbihan): variant of Riou from the old Breton personal name Riou, a diminutive of ri ‘king’; or in some cases perhaps an ironic nickname derived from the same word. Compare Rioux.
French (southern): variant of Rioux.
Source: Dictionary of American Family Names 2nd edition, 2022
