Mary de Vere English noblewoman (1501–1624) Parents Margery Golding John de Vere, 16th Earl of Oxford Children Catherine Bertie Robert Bertie, 1st Earl of Lindsey Siblings Edward de Vere, 17th Earl of Oxford Lady Katherine de Vere Partners Sir Eustace Hart Peregrine Bertie, 13th Baron Willoughby de Eresby