Where does “thous” come from?

thous (Middle English) comes from Old English þus, from Proto-West Germanic þus — thus, in this way.

Ancestry of “thous”, step by step

StepLanguageWordMeaning
1Old Englishþusthus, in this way
2Proto-West Germanicþusthus, in this way
Every word from Proto-West Germanic þus →Every word from Old English þus →