Old Norse þorskr

← Proto-Germanic *þurskaz (inherited)

← Proto-Indo-European *ters- (root)

← Proto-Indo-European *ters- (derived)

→ Danish torsk (derived)

→ German Dorsch (derived)

→ Faroese toskur (inherited)

→ Irish trosc (derived)

→ Icelandic þorskur (inherited)

→ Norwegian Bokmål torsk (derived)

→ Norwegian Nynorsk torsk (derived)

→ Old Norse þyrsklingr (suffix)

→ Polish dorsz (derived)

→ Swedish torsk (derived)