“ ESTRÉES, GABRIELLE D’ (1573–1599) , mistress of Henry IV. of France, was the daughter of Antoine d’Estrées, marquis of Cœuvres, and Françoise Babou de la Bourdaisière. Henry IV., who in November 1590 stayed at the castle of Cœuvres, became violently enamoured of her. Her father, anxious to save his daughter from so perilous an entanglement, married her to Nicholas d’Amerval, seigneur de Liancourt, but the union proved unhappy, and in December 1592, Gabrielle, whose affection for the king was sincere, became his mistress. ”