Funny thing with the genealogies I've drafted is that if TTL Beauclerks post 2nd Duke of St Albans intemarry with either FitzJames-de Vere or Earls of Waldegrave (or descendants of Earl of Rochford (https://en.wikipedia.org/wiki/Henry_FitzJames ) provided he followed the example of his big brother TTL and regained good standing of his half-sister the Queen and English titles, though the Ducal title is unlikely for him, but Earldom of Rochford is pretty possible) - the resulting person would be simultaneously descendant of Charles II, James II, Karl Ludwig I of Palatinate and Prince Rupert of Palatinate