co

I.

cho, co

as, so, Irish comh, Welsh cyn; from com, with. See comh-. Gaelic "Cho dubh ri feannaig" = Welsh "Cyn ddued a'r frân".

II.

co, cho

as, so; See cho.

III.

co, cò

who, Old Irish co-te, now Gaelic ciod, q.v.; Welsh pa, Cornish py, pe, Breton pe, quia, root qo-, qa, qe; Latin quod; Greek $$Gpó-qi, etc.; English who.