Lucy Somerset was born about 1524 to Henry Somerset, 2nd Earl of Worcester and his first wife Lady Margaret Courtenay, daughter of William Courtenay, 1st Earl of Devon, by Catherine of York, daughter of Edward IV, King of England,[1] though some sources say by his second wife, Elizabeth Browne, the daughter of Sir Anthony Browne, Governor of Queenborough and Lieutenant of Calais and his second wife, Lucy Neville, daughter of John Neville, 1st Marquess of Montagu.[2] Through Lucy's aunt's marriage to Sir Charles Brandon, later Duke of Suffolk, she was a first cousin of Lady Anne Brandon, and her younger sister, Lady Mary Brandon.
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Lucy Neville (c.1549 – April 1608), who married Sir William Cornwallis (c.1551-1611) of Brome, Suffolk.