Old Norse ljós

← Proto-Germanic *leuhsą (inherited)

← Proto-Indo-European *lewk- (root)

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

→ Danish lys (inherited)

→ Faroese ljós (inherited)

→ Irish léas (derived)

→ Old Swedish lius (inherited)

→ Icelandic ljós (inherited)

→ Norwegian Bokmål lys (derived)

→ Norwegian Nynorsk lys (derived)

→ Norwegian Nynorsk ljos (inherited)

→ Old Norse Ljósálfar (compound)

→ Elfdalian liuos (inherited)

→ Old Irish lés (borrowed)

→ Swedish ljus (inherited)