William Bourchier, 9th Baron FitzWarin English politician (1407–1470) Parents William Bourchier Anne Plantagenet, Countess of Eu Children Fulk Bourchier, 10th Baron FitzWarin Blanche Bourchier Siblings Henry Bourchier, 1st Earl of Essex John Bourchier, 1st Baron Berners Eleanor Bourchier Thomas Bourchier Humphrey Stafford, 1st Duke of Buckingham Philippa de Stafford Lady Anne Stafford Partners Katherine Affeton Thomasine Hankeford, Baroness FitzWarin