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In page Margaret Pole, Countess of Salisbury:

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Margaret's daughter Ursula married Henry Stafford, the only son of Edward Stafford, 3rd Duke of Buckingham and Lady Alianore Percy, in 1519. She was about 15 years old, and he was not yet 18 at the time of the marriage.[15] After the Duke of Buckingham was beheaded for treason and posthumously attainted by an Act of Parliament in 1521, the couple were given only fragments of his estates.[citation needed] Ursula's husband was created 1st Baron Stafford by King Henry's son and successor, Edward VI in 1547. They had a total of seven sons and seven daughters.[15]