köken: By surface analysis, Katrin + plommon. Cognate with German Katharinenpflaume, French prune Sainte Catherine (“Sainte-Catherine plum”). Likely named after Catherine of Alexandria (or possibly some other saint named "Catherine"), but the exact reason is unclear.
köken: From Vulgar Latin *prūna, feminine singular formed from the neutral plural of Latin prūnum, from Ancient Greek προῦνον (proûnon), variant of προῦμνον (proûmnon, “plum”), a loanword from a language of Asia Minor. Doublet of pluma.