Latin dūplus

→ Asturian doblar (inherited)

→ Catalan doblar (inherited)

→ Catalan doble (inherited)

→ French doubler (inherited)

→ Old French doble (inherited)

→ Old French dobler (inherited)

→ Friulian dopli (inherited)

→ Irish dúbail (derived)

→ Galician dobre (inherited)

→ Galician dobrar (derived)

→ Hittite 𒆜𒀸 (cognate)

→ Latin duplo (mention)

→ Occitan doble (inherited)

→ Old Occitan doblar (inherited)

→ Portuguese dobro (inherited)

→ Portuguese duplo (borrowed)

→ Portuguese dobrar (inherited)

→ Romanian dublu (derived)