Where does “þefþe” come from?

þefþe (Middle English) comes from Old English þīefþu, from Proto-Germanic þiubiþō, from Proto-Germanic -iþō, from Proto-Indo-European -iteh₂ — -th.

Ancestry of “þefþe”, step by step

StepLanguageWordMeaning
1Old Englishþīefþu—
2Proto-GermanicþiubiþōThe state or condition of a thief; thiefdom;...
3Proto-Germanic-iþō-ness, -th
4Proto-Indo-European-iteh₂-th
Every word from Proto-Indo-European -iteh₂ →Every word from Proto-Germanic -iþō →Every word from Proto-Germanic þiubiþō →