Mary Ann de Mestre (née Black) (1801–1861) was the wife of Prosper de Mestre (1789–1844) a prominent French-Australian Sydney businessman in the early 19th century; and the mother of Etienne Livingstone de Mestre (1832–1916) the trainer of the racehorse Archer who won the first and second Melbourne Cups in 1861 and 1862, and the foremost Australian horse trainer of his era. It was on her 1,300-acre (5.3 km2) property of "Terara" on the Shoalhaven River near Nowra on the South Coast of New South Wales that Etienne established a horse stud, stable and racecourse.