←
Old English ġetwin (inherited)
←
Old English twinn (mention)
←
Old English twin (inherited)
←
Middle English twinne (inherited)
←
Middle English twynne (mention)
←
Middle English *twin (inherited)
←
Middle English *twyn (mention)
←
Middle English twinn (mention)
←
Proto-Indo-European *dwino- (derived)
←
Proto-Indo-European *dwóh₁ (mention)
←
Proto-Indo-European *dwóh₁ (derived)
→
Japanese ツイン (borrowed)