Roger Palmer, 1st Earl of Castlemaine, PC was an English courtier, diplomat, and briefly a member of parliament, sitting in the House of Commons of England for part of 1660. He was also a noted Roman Catholic writer. His wife Barbara Villiers was one of Charles II's mistresses.

Barbara Palmer, 1st Duchess of Cleveland, Countess of Castlemaine, was an English royal mistress of the Villiers family and perhaps the most notorious of the many mistresses of King Charles II of England, by whom she had five children, all of them acknowledged and subsequently ennobled. Barbara was the subject of many portraits, in particular by court painter Sir Peter Lely.