Gabrielle d'Estrées, Duchess of Beaufort and Verneuil, Marchioness of Monceaux 1573 – 10 April 1599) was a French mistress of King Henry IV of France, born at either the Château de la Bourdaisière in Montlouis-sur-Loire, in Touraine, or at the château de Cœuvres, in Picardy.
Charlotte de Sauve (1551 - 1617). Mistress of Henri IV. She was a member of the Flying Squadron, a group of beautiful spies hired to Catherine de Medici to seduce powerful men. She would pass information on to Catherine de Medici about Henri IV, but this caused Catherine's daughter, Margot, to become miserable.