Old Norse tvífaldr

← Old English twifeald (cognate)

← Proto-Germanic *twifaldaz (inherited)

← Old Norse tví- (affix)

← Old Norse -faldr (affix)

→ English twifold (cognate)

→ Old English twifeald (cognate)

→ Icelandic tvöfaldur (inherited)

→ Old Norse tvífalda (mention)

→ Swedish tvåfaldig (inherited)