Which

A Concise Dictionary of Middle English from A.D. 1150 to 1580 · 1889 · p. 29

pron. interrog. and rel. , adj. which, S2; whilk , S2; whillc , S; whulche , S; hwilc , S; hwilch , S; hwich , S; hwuch , S; huych , S; huyche , S2; wulc , S; wilk , S2; wulche , S; woche , S; wuch , S2; wic , S; quilc , S; quilk , S2 ( squilk ) H; quhilk , S3. Comb. : wilc so , whichsoever, S; hwychso , S.—AS. hwilc (for hwí-líc ).