Proto-Indo-European *tr̥nós

→ English thorn (inherited)

→ English Thorn (inherited(en/de))

→ Danish torn (inherited)

→ German Dorn (derived)

→ Middle English thorn (inherited)

→ Faroese torn (inherited)

→ Icelandic þyrnir (inherited)

→ Komi-Permyak турун (derived)

→ Norwegian Bokmål torn (inherited)

→ Norwegian Nynorsk torn (inherited)

→ Old Norse torn (inherited(non/sv))

→ Old Norse þorn (inherited)

→ Old Norse þyrnir (inherited)

→ Sanskrit तृण (inherited)

→ Swedish törne (inherited)

→ Udmurt турын (derived)