 Katherine Stanhope, Countess of Chesterfield was the governess and confidante of this Princess who was married to who 
Katherine Stanhope, Countess of Chesterfield: Katherine Stanhope, Countess of Chesterfield (1609–1667) was the governess and confidante of Mary, Princess Royal and Princess of Orange, and was the first woman to hold the office of Postmaster General of England. Mary, Princess Royal and Princess of Orange: Mary, Princess Royal (Mary Henrietta; 4 November 1631 – 24 December 1660) was Princess of Orange and Countess of Nassau by marriage to Prince William II, and co-regent for her son during his minority as Sovereign Prince of Orange from 1651 to 1660.
Prince William II