interrog. and rel. pron. Obs. Forms: 13 hwon, hwan, 3 whan, wan. [OE. hwon, used as instrumental case of hwæt WHAT.] In dependence on a prep. = What, which; esp. in for whon = because of what or which, why, wherefore.
c. 950. Lindisf. Gosp., Matt. vi. 31. Quo operiemur, of huon we biðon wriʓen.
c. 1000. Guthlac, 244. Bi hwon scealt ðu lifʓan?
a. 1122. O. E. Chron. (Laud MS.), an. 1104. He wið þone cyng ʓeworhte, for hwan hine se cyng ealles benæmde.
c. 1200. Trin. Coll. Hom., 191. Þe ne hauen mid hwan hie hem werien.
c. 1205. Lay., 2679. Maidene castel he wes icleoped, nat ich for wan it was swa idon.
a. 1250. Owl & Night., 716. Wostu to hwan man wes ibore? To þare blissi of heue[n]ryche.
c. 1275. Passion our Lord, 49, in O. E. Misc., 38. Mvchel volk hym vulede, wyte ye for hwon.