Old Norse lús

← Old English lūs (cognate)

← Proto-Germanic *lūs (inherited)

← Old High German lūs (cognate)

→ Old English lus (cognate)

→ Danish lus (inherited)

→ Faroese lús (derived)

→ Westrobothnian lus (inherited)

→ Old Swedish lus (inherited)

→ Icelandic lús (derived)

→ Norwegian Bokmål lus (inherited)

→ Norwegian Nynorsk lus (inherited)

→ Swedish lus (inherited)