Claim: Ordgar was the son of  Edgar the Peaceful and Ealdorman of Devon in England in 964 who married an unknown lady of royal birth, by whom he had a daughter Ælfthryth and owned land in every parish from Exeter in Devon to Frome in Somerset
Evidence: He was a great West Country landowner and apparently a close advisor of his son-in-law Edgar the Peaceful, king of England. 
About 964/965 Edgar married, possibly for a third time, to Ælfthryth, widow of Æthelwald, Ealdorman of East Anglia, Edgar's adopted brother. Ælfthryth was the daughter of Ealdorman Ordgar and his wife, a member of the royal family of Wessex.