Elisabeth Parr, Marchioness of Northampton (d. 1565)
Elisabeth Brooke (25 June 1526 – 2 April 1565) was an English courtier and noblewoman. She the eldest daughter of George Brooke, 9th Baron Cobham of Kent and Anne, his wife. She was the niece of Sir Thomas Wyatt the elder, the courtier-poet credited with bringing the sonnet form into the English language, and Elizabeth Brooke who was associated with Henry VIII of England. Elisabeth openly lived in adultery with William Parr, 1st Marquess of Northampton and bigamously married him. At times, she was accepted at court as the Marchioness of Northampton. She was the sister-in-law of Katherine Parr, King Henry VIII's sixth queen. Her first cousin, Thomas Wyatt the Younger, was the leader of a rebellion against Queen Mary I known as Wyatt's Rebellion. The whole family was implicated. She became one of the most influential courtiers again during the reign of Elizabeth I.

Elisabeth was described as vivacious, kind and one of the most beautiful women at court. Her relationship with William Parr, Katherine Parr’s brother, would shape the politics of England for many years to come. Elisabeth became a queenmaker when she arranged for Lady Jane Grey to inherit the crown of England, in accordance with Henry VIII’s earlier wishes, as shown in his will. As the Marchioness of Northampton, Elisabeth performed much of a queen’s role during the reign of Edward VI, as she was the wife of the second most important man at court.