←
Proto-Germanic *dōkaz (inherited)
←
Middle High German tuoch (inherited)
←
Old High German tuoh (inherited)
→
Cimbrian tuach (cognate)
→
Esperanto tuko (borrowed)
→
Central Franconian Duch (cognate)
→
Luxembourgish Duch (cognate)
→
Pennsylvania German Duch (cognate)