Etymograph > Indo-European > Old English > Dictionary > þīon

to thrive

Source: Ringe 2014:315
originates from: PGmc *þinhaną "to thrive" (þinhaną > þinhan > þīhan > þīohan > þīon > þēon) through pgmc-to-oe
(source: Ringe 2014:315)
Variations
þēon "thrive, prosper"