Old Norse siðr

← Old English sidu (cognate)

← German Sitte (cognate)

← Proto-Germanic *siduz (inherited)

← Old High German situ (cognate)

← Gothic 𐍃𐌹𐌳𐌿𐍃 (cognate)

← Ancient Greek ἦθος (cognate)

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

→ Danish sæd (derived)

→ Faroese siður (inherited)

→ Old Swedish siþer (inherited)

→ Old High German situ (cognate)

→ Icelandic siður (inherited)

→ Swedish sed (inherited)