As best as I can figure, Henry I m. the widow Ann Harwood c. 1652.They had son Henry II.She died and he remarried Mary Mansfield, d/o Capt. David Mansfield. She was widowed and remarried by 1686.There are several citations in the Stafford Co. record book of that time relating to a certain land transaction, showing Mary Mansfield's remarriage to a John Hoard/Hard and relating that she called Henry Blagrave her "Sonne in Law" (stepson.This Henry II was married to Sarah ???and living in New Kent Co.
I suspect a missing generation between Henry & Sarah and Henry(d. 1782) & Mary.
Would love to compare notes more thoroughly. Suzy in FL