Family name origins & meanings
- Asturian-Leonese and Aragonese : Castilianized form of Grau, a habitational name from Grau (Asturies) or Lo Grau (Uesca, Aragon).
- Italian : possibly from a variant of the omen name Grado or from a short form of a compound name formed with this element, or alternatively a habitational name from a place called Grado. See De Grado.