found: Castarède, J. Gabrielle d'Estrées, ou, La passion du roi, c1987:p. 298 (b. in 1570 or 1573 in Cœuvres) p. 326 (d. 1599)
found: Dic. d'histoire de France, c1981:p. 358 (Estrées (Gabrielle d'); b. 1573 in Paris, d. 1599, maîtresse d'Henri IV, daughter of Antoine d'Estrées and Françoise Babou de La Bourdaisière)
found: LC data base, 8/24/88(hdg.: Estrées, Gabrielle d', 1573?-1599)
found: Blin de Sainmore, Adrien Michel Hyacinthe. Lettre de Gabrielle d'Etrées a Henri IV, 1766, via Gallica, Feb. 25, 2015
found: BnF authorities, Feb. 25, 2015(AAP: Estrées, Gabrielle d' (1571-1599); born 1571, Château de Coeuvres (Couevres-et-Valsery, Aisne); died 1599-04-09, Paris; favorite of King Henri IV from 1591; married in 1592 to Nicolas d'Amerval, seigneur de Liencourt; the king had this marriage annulled in 1595; created marquise de Montceaux (1595), then duchesse de Beaufort (1597); variants: Beaufort, Gabrielle d'Estrées (1571-1599 ; duchesse de); Montceaux, Gabrielle d'Estrées (1571-1599 ; marquise de))
found: Wikipedia, Feb. 25, 2015(Gabrielle d'Estrées; Gabrielle d'Estrées, Duchess of Beaufort and Verneuil, Marchioness of Monceaux; 1573-10 April 1599; mistress of 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)
found: Desclozeaux, Adrien. Gabrielle d'Estrées, marquise de Monceaux, duchesse de Beaufort, 1889, via Internet Archive, Feb. 25, 2015:pages 1-2 (two places have been proposed as her birthplace: the château de la Bourdaisière, near Tours, and the château de Cœuvres, in Picardy; she was probably born towards the end of 1573, according to her own testimony, and probably at the château de Cœuvres, where her father was residing most of that year)
found: VIAF, Feb. 25, 2015(Estrées, Gabrielle d', 1571-1599: National Library of Poland, German National Library, Sudoc France, ISNI-test, NUKAT Center of Warsaw University Library, National Library of France, National Library of Spain; Estrées, Gabrielle d', 1573?-1599: National Library of Catalonia, Library of Congress/NACO; Estrées, Gabrielle d', 1570-1599: National Library of the Netherlands; Estrée, Gabrielle d' 1571-1599: German National Library; Estrées, Gabrielle de, 1573?-1599: National Diet Library, Japan; Estrees, Gabrielle D: Wikipedia; Gabrielle d'Estrées, ca 1571-1599: National Library of the Czech Republic)
