Mary, Countess of Northampton

Spencer Compton, 2nd Earl of Northampton, 1601-43 married Mary Beaumont, a cousin of the Marquis (later Duke) of Buckingham in 1621.

Spencer Compton was succeeded as third Earl of Northampton by his eldest son, James Compton (1622-81). Four of Compton's sons fought in the King's armies: James, Charles, William and Spencer. His third son, William Compton (1625-63), was knighted for his defence of Banbury and became a founder member of the Sealed Knot conspiracy ring.

not a known daughter of Francis Beaumont, of Gracedieu, MP

• http://bcw-project.org/biography/spencer-compton-earl-of-northampton
• http://thepeerage.com/p3025.htm#i30242