Old Norse sjau

← Old English seofon (cognate)

← Proto-Germanic *sebun (inherited)

← Proto-Germanic (mention)

← Old High German sibun (cognate)

← Gothic 𐍃𐌹𐌱𐌿𐌽 (cognate)

← Proto-Indo-European *septḿ̥ (derived)

→ Old English seofon (cognate)

→ Danish syv (inherited)

→ Faroese sjey (derived)

→ Old Danish siu (derived)

→ Old Swedish siu (derived)

→ Icelandic sjö (derived)

→ Norwegian Bokmål sju (derived)

→ Norwegian Nynorsk sju (derived)

→ Old Norse sjautigi (suffix)

→ Elfdalian sju (derived)

→ Swedish sju (derived)