Where does “Welsh onion” come from?

Welsh onion (English) comes from English onion, from Middle English onyoun, from Old French oignon, from Latin ūniō, from Latin -iō, from Proto-West Germanic -jō, from Proto-Indo-European -yéti, from Proto-Indo-European yé- — he, she.

Welsh onion (English): A species of onion

Definitions

  1. A species of onion

Ancestry of “Welsh onion”, step by step

Welsh onion traces back through two separate lines of ancestry.

via English onion

StepLanguageWordMeaning
1EnglishonionA monocotyledonous plant (Allium cepa), allied to garlic, used as vegetable and spice
2Middle EnglishonyounThe onion plant
3Old Frenchoignononion
4Latinūniōa unity, union
5Latin-iō
6Proto-West Germanic-jōForms agent nouns from verbs
7Proto-Indo-European-yétiCreates intransitive, often deponent,...
8Proto-Indo-Europeanyé-
9Chichewaiyehe, she

via English Welsh

StepLanguageWordMeaning
1EnglishWelshBritish; pertaining to the Celtic peoples who...
2Middle EnglishWalschWelsh; from or of Wales or its people; unusual,...
3Old Englishwælisc
4Proto-Germanicwalhazforeigner, non-Germanic person
5LatinVolcaea Gallic tribal confederation; name of a Celtic...
6Proto-Celticwolkoshawk
7Proto-Indo-Europeanwelg-wet, damp
Every word from Chichewa iyeEvery word from Proto-Indo-European -yétiEvery word from Latin -iō