William Douglas Sloane (February 29, 1844 – March 19, 1915) was an American businessman, sportsman, philanthropist, and member of New York society during the Gilded Age.
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Early life
Sloane was born in New York City on February 29, 1844. He was the third son of William Sloane (1810–1879) and Euphemia (née Douglas) Sloane (1810–1886). Among his siblings was John Sloane, who married Adela Berry; Douglas Sloane; Mary Elizabeth Sloane; Henry Thompson Sloane, who married Jessie Ann Robbins (who later divorced him so she could marry Perry Belmont); and Euphemia (née Sloane) Coffin, who married Edmund Coffin and was the mother of Rev. Henry Sloane Coffin and William Sloane Coffin Sr.
His parents were emigrants from Kilmarnock, Scotland. His paternal grandparents were John Sloane and Jane Mary (née Lammie) Sloane, and his maternal grandparents were David and Margaret Douglas.