In 1565 Grenville married Mary St Leger (c. 1543–1623), daughter of Sir John St Ledger of Annery, Monkleigh, near Bideford, and heir to her brother.
She outlived her husband and died aged about 80 on 9 November 1623 and was buried at St Mary's Church, Bideford.
The family initially lived at Buckland Abbey before moving to a newly built house at Bideford.
They had four sons, including Bernard Grenville.
In 1565 Grenville married Mary St Leger (c. 1543–1623), daughter of Sir John St Ledger of Annery, Monkleigh, near Bideford, and heir to her brother. She outlived her husband and died aged about 80 on 9 November 1623 and was buried at St Mary's Church, Bideford. The family initially lived at Buckland Abbey before moving to a newly built house at Bideford. They had four sons, including Bernard Grenville.
Richard Grenville