Margaret de Vere English noble (1340–1398) Parents Maud de Badlesmere, Countess of Oxford John de Vere, 7th Earl of Oxford Children John Devereux, 2nd Lord Devereux Margaret de Loveyne Catherine Beaumont Margaret|Eleanor Beaumont John Beaumont, 4th Baron Beaumont Joan Devereux, 3rd Baroness Devereux Siblings Thomas de Vere, 8th Earl of Oxford Elizabeth de Vere Aubrey de Vere, 10th Earl of Oxford Robert de Vere Maud de Vere John de Vere Partners Sir Nicholas Lovain Henry Beaumont, 3rd Baron Beaumont John Devereux, 1st Baron Devereux