Riolo Family History
Riolo Surname Meaning
Italian (southern):: habitational name from any of various places called with Riolo or Riola such as Riolo in Modena, Riolo Terme in Ravenna, and Riola in Bologna or from a shortened form of Oriolo, the name of a place in Cosenza province.
Possibly a diminutive of Rio.
Source: Dictionary of American Family Names 2nd edition, 2022
