Who dated Isadora Duncan?

Mercedes de Acosta (March 1, 1892 – May 9, 1968) was an American poet, playwright, and novelist. Although she failed to achieve artistic and professional distinction, de Acosta is known for her many lesbian affairs with celebrated Broadway and Hollywood personalities including Alla Nazimova, Isadora Duncan, Eva Le Gallienne, and Marlene Dietrich. Her best-known involvement was with Greta Garbo with whom, in 1931, she began a sporadic and volatile romance. Her 1960 memoir, Here Lies the Heart, is considered part of gay history insofar that it hints at the lesbian element in some of her relationships.