'Margaret Beaufort' can mean:
★ '
Lady Margaret Beaufort' (1443-1509), the daughter of
John Beaufort, 1st Duke of Somerset (first creation), the mother of King
Henry VII of England, and the wife of
John de la Pole and
Edmund Tudor and
Thomas Stanley .
★ '
Margaret Beaufort, Countess of Stafford' (~1427-1474), the daughter of
Edmund Beaufort, 1st Duke of Somerset (second creation), the mother of
Henry Stafford, 2nd Duke of Buckingham, and the wife of
Earl Stafford and Sir Richard Darrell.
They are often confused with each other, since both had fathers who were titled First
Duke of Somerset, and both had sons called Henry who were claimants to the throne in 1485 and 1483 respectively. They were first cousins, and their sons were second cousins.
There was also an older namesake member of the same family.
★ '
Margaret Beaufort, Countess of Devon' (c. 1409 - 1449) , the daughter of
John Beaufort, 1st Earl of Somerset, the mother of both
Thomas Courtenay, 14th Earl of Devon and
John Courtenay, 15th Earl of Devon, wife of
Thomas de Courtenay, 13th Earl of Devon.