←
Proto-Germanic *aiþaz (inherited)
←
Proto-Germanic *aidiją (inherited)
←
Old Swedish eþer (inherited)
←
Old Swedish eþ (inherited)
←
Proto-Indo-European *h₁óytos (inherited)
←
Proto-Indo-European *h₁ey- (derived)
←
Icelandic eið (cognate)
←
Norwegian eid (cognate)
←
Old Norse eiðr (inherited)
←
Old Norse eið (inherited)
→
Norwegian Bokmål eid (cognate)
→
Norwegian Nynorsk eid (cognate)