Proto-Germanic *leuhsaz

→ Danish lys (derived)

→ Danish lyn (derived)

→ Danish lyske (mention)

→ Danish lyse (mention)

→ Faroese ljósur (derived)

→ Westrobothnian ljusk (mention)

→ Old Swedish lius (inherited)

→ Scanian lyn (derived)

→ Icelandic ljós (derived)

→ Icelandic lýsa (mention)

→ Norwegian Bokmål lys (derived)

→ Norwegian Nynorsk lys (derived)

→ Old Norse ljóss (inherited)

→ Swedish ljus (inherited)