Proto-Germanic *nadrǭ

→ English adder (inherited)

→ Afrikaans adder (inherited)

→ Old English nædre (inherited)

→ German Natter (inherited)

→ West Frisian njirre (inherited)

→ Icelandic naðra (inherited)

→ Luxembourgish Adder (inherited)

→ German Low German Adder (inherited)

→ Old Norse naðra (inherited)

→ Old Saxon nadra (inherited)