Family name origins & meanings
- French : habitational name from Rioux in Charente-Maritime or Rioux-Martin in Charente, or any of various minor places named with this word.
- Southern French : topographic name for someone who lived by a stream, from Old Provençal rieu (Latin rivus).
- A Rioux from Brittany is documented in Ste. Famille, Quebec, in 1673.