Philippa de Coucy

Philippa de Coucy, Countess of Oxford, Duchess of Ireland (before 18 April 1367 – October 1411) was a first cousin of King Richard II of England and the wife of his favourite, Robert de Vere, 9th Earl of Oxford, Marquess of Dublin, Duke of Ireland.

Read more about Philippa De Coucy:  Marriage, Repudiation and Divorce