Old Norse þak

← Old English þæc (cognate)

← Proto-Germanic *þaką (inherited)

← Old High German dah (cognate)

← Proto-Indo-European *teg- (derived)

← Old Saxon thak (cognate)

→ English thack (cognate)

→ English Thackeray (compound)

→ Old English þæc (cognate)

→ Danish tag (inherited)

→ Faroese tak (inherited)

→ Westrobothnian tak (inherited)

→ Icelandic þak (inherited)

→ Norwegian Bokmål tak (inherited)

→ Norwegian Nynorsk tak (inherited)

→ Swedish tak (inherited)