Where does “thow” come from?

thow (Middle English) comes from Old English þū, from Proto-West Germanic þū, from Proto-Germanic *þū, from Proto-Indo-European túh₂ — you, thou.

Ancestry of “thow”, step by step

StepLanguageWordMeaning
1Old Englishþūyou, thou (nominative singular)
2Proto-West Germanicþūyou
3Proto-Germanic*þū—
4Proto-Indo-Europeantúh₂you, thou
Every word from Proto-Indo-European túh₂ →Every word from Proto-Germanic *þū →Every word from Proto-West Germanic þū →
thow — Etymology, Origin & Word History | Etymology Explorer