RED ROSE~~ Katherine of Valois was a wife of Henry V, mother of Henry VI. Later she was wed with Owen Tudor and became mother to Edmund, Jasper, Margaret, Catherine and Tasinda Tudor. So she was a paternal grandmother of Henry VII
Lady Isabel Neville was the elder daughter of Richard Neville, 16th Earl of Warwick, the Kingmaker of the Wars of the Roses, and Anne de Beauchamp, 16th Countess of Warwick. She was the wife of George Plantagenet, 1st Duke of Clarence.