Seafield was the fourth son of Francis William Ogilvy-Grant, 6th Earl of Seafield, and Mary Anne Dunn. He achieved the rank of lieutenant colonel in the army.
Seafield, as a scion of the noble Ogilvy-Grant family, was the fourth child of Francis William Ogilvy-Grant, 6th Earl of Seafield, and Mary Anne Dunn. His military career culminated in him holding the rank of lieutenant colonel.