Harry Coster

Henry Arnold Coster ( – November 2, 1917) was an American clubman who was prominent in New York Society during the Gilded Age. Early life Coster was the son of Daniel Joachim Coster and Julia (née DeLancey) Coster (1806–1890), who married in 1835 and lived at 234 West 14th Street. His father became a member of the auction firm of Hone & Coster. They established the family estate in Westchester (which became part of the Bronx in 1895). His paternal grandparents were Catherine Margaret (née Holsman) Coster and John Gerard Coster, who came to the United States shortly after the Revolutionary War from Haarlem in the Netherlands and founded the family fortune with his brother through the mercantile firm, "Henry A. & John G. Coster", and died in 1844. His grandparents had twelve children that married into many prominent families including the Schermerhorns and Heckshers. His paternal uncles included Gerard H. Coster who married Matilda Prime (a daughter of banker Nathaniel Prime), George Washington Coster who married Elizabeth Oakey (a daughter of merchant Daniel Oakey), and his aunt was Georgiana Louisa Coster, who married Charles August Heckscher. Among his many first cousins was Charles Henry Coster and John Gerard Heckscher. His maternal grandfather was Oliver Delancey of the Delancey family, which was one of the oldest families in New York state. His paternal uncles included Daniel Delancey and John Delancey, who later owned part of the Coster Estate in Westchester.