Old Norse þorn

← Old English þorn (cognate)

← Proto-Germanic *þurnuz (inherited)

← Proto-Indo-European *tr̥nós (inherited)

← Proto-Indo-European *(s)ter- (mention)

→ Old English þorn (cognate)

→ Danish torn (inherited)

→ Faroese torn (inherited)

→ Icelandic þyrnir (inherited)

→ Norwegian Bokmål torn (inherited)

→ Norwegian Nynorsk torn (inherited)

→ Old Saxon thorn (cognate)

→ Sanskrit तृण (cognate)

→ Swedish torn (derived)

→ Swedish törne (inherited)