Proto-Germanic *duganą

→ English dow (inherited)

→ English douth (mention)

→ Afrikaans deug (inherited)

→ Danish du (inherited)

→ Danish dyd (mention)

→ Danish dygtig (derived)

→ German taugen (mention)

→ German Unducht (derived)

→ Middle English douen (inherited)

→ Faroese duga (inherited)

→ Westrobothnian dåga (inherited)

→ Old Swedish dugha (inherited)

→ Old High German tugan (inherited)

→ Gothic 𐌳𐌿𐌲𐌰𐌽 (inherited)

→ Norwegian Bokmål due (derived)

→ Norwegian Bokmål duge (inherited)

→ Dutch deugen (inherited)

→ Old Norse duga (inherited)

→ Swedish duktig (derived)

→ Swedish duga (inherited)

→ Swedish dygd (mention)