Type Word Usage Old Welsh Meaning & History Welsh word meaning "good" [1] . Related ItemsFamily Tree ·Details Other Languages & Culturesdagos (Old Celtic) dag (Old Irish) Given Name DescendantsGwenda (English) Gwenda (Welsh) Same Spellingɗa, da 1, da 2, da 4, da 5, dá, dà, dā Sources & ReferencesShow Inline Numbers Hide Inline Numbers Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Brill, 2009, page 87. Share on Facebook Share on Twitter Entry updated May 26, 2026