α. early Middle English White-sune-tide, early Middle English Wit-sonentid, Middle English Qhythson tyd, Middle English Whitesonetyde, Middle English Whitsonetyd, Middle English Whitsonetyde, Middle English Whitsontyd, Middle English Whyttsontyde, Middle English Witesone tid, Middle English Witesontid, Middle English Witesontyd, Middle English Witsuntide, Middle English Wittesontyde, Middle English Wytsontide, Middle English Wytson tyde, Middle English Wyȝtsounetyde, Middle English–1500s Whytsontyde, Middle English–1500s Whytson tyde, Middle English–1500s Witsontyde, Middle English–1500s Wytsontyd, Middle English–1500s Wytsontyde, Middle English–1600s Whitsontid, Middle English–1600s Witsontide, Middle English–1700s Whitsontide, 1500s Whitesontyde, 1500s Whittsontyd, 1500s Whytesontyde, 1500s Whytsontide, 1500s Witsenstyde, 1500s Witsonnetide, 1500s–1600s Whitsuntid, 1500s–1600s Whitsuntyde, 1500s– Whitsuntide, 1600s Whitesontide, 1600s Whitson-tyde; N.E.D. (1924) also records a form of the first element 1500s Witte-.
β. Middle English Wesontyde, Middle English Whisson tyde, Middle English Whissontyde, Middle English Whisson-tyde, Middle English Whyssentyde, Middle English Whyssone-tyde, Middle English Whysson tyde, Middle English Wissontide, 1500s Whysontide, 1600s (1800s English regional (northern)) Whissontide, 1800s Whissuntide (Scottish); N.E.D. (1924) also records a form of the first element late Middle English Whissone-.