Family name origins & meanings
- Catalan (Rayó) : variant of Relló, nickname from relló, a derivative of rella ‘ploughshare’.
- Spanish (from Asturian-Leonese) : Castilianized variant of Rayu, habitational name from El Rayu, a town in Asturies.
- Spanish : possibly from rayo ‘flash of lightning’, which may be a nickname in the sense ‘lively’.