Swedish so

← Proto-Germanic *sūz (inherited)

← Old Swedish so (inherited)

← Old Swedish kō (cognate)

← Proto-Indo-European *sū- (derived)

← Old Norse sýr (mention)

← Old Norse kýr (mention)

← Swedish ko (mention)

→ Old English su (cognate)

→ Alemannic German Sou (cognate)

→ Alemannic German Suu (cognate)

→ Luxembourgish Sau (cognate)

→ Old Norse sýr (cognate)