Old English or

← Proto-Germanic *ōzô (inherited)

← Proto-Germanic *ōsaz (mention)

← Proto-Indo-European *h₃éh₁os (inherited)

→ Old English orþanc (prefix)

→ Old English orsorg (prefix)

→ Old English ortreowe (prefix)

→ Old English orblede (prefix)

→ Old English orsawle (prefix)