Old French duc

← Latin dux (borrowed)

→ English duke (derived)

→ English duchy (derived)

→ Catalan duc (borrowed)

→ Middle English duke (borrowed)

→ Middle English duk (derived)

→ Spanish duque (borrowed)

→ French duc (inherited)

→ Middle French duc (inherited)

→ Hindi ड्यूक (derived)

→ Norman duc (inherited)

→ Portuguese duque (borrowed)