Type Word Usage Old Welsh Meaning & History Old Welsh word meaning "king" [1] . Related ItemsFamily Tree ·Details Other Languages & Culturesrīxs (Old Celtic) rí, rígain (Old Irish) Given Name DescendantsRiderch, Rotri (Old Welsh) Rhodri, Rhydderch, Roderick (Welsh) Surname DescendantRhydderch (Welsh) Same Spellingri 2, ri 3, ri 4, ri 5, ri 6, ri 7, ri 8, rí 1, rí 2, rì Sources & ReferencesShow Inline Numbers Hide Inline Numbers Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Brill, 2009, page 311. Share on Facebook Share on Twitter Entry updated May 26, 2026