John Jacob Astor IV IV was born on July 13, 1864 at his parents' country estate Ferncliff in Rhinebeck, New York. He was the youngest of five children and only son of businessman, collector, and race horse breeder/owner William Backhouse Astor, Jr. and socialite Caroline Webster "Lina" Schermerhorn. His four elder sisters were Emily, Helen, Charlotte, and Caroline ("Carrie"). He was a great-grandson of fur-trader John Jacob Astor and Sarah Cox Todd, whose fortune made the Astor family one of the wealthiest in the United States. Astor's paternal grandfather William Backhouse Astor, Sr. was a prominent real estate businessman. Through his paternal grandmother, Margaret
William Backhouse Astor Jr. of real estate businessman William Backhouse Astor Sr. (1792–1875) and Margaret Rebecca (née Armstrong) Astor (1800–1872). His siblings included elder brother John Jacob Astor III, who married Charlotte Augusta Gibbes; Emily Astor, who married Samuel Cutler Ward; Laura Eugenia Astor, who married Franklin Hughes Delano; Mary Alida Astor, who married John Carey; Henry Astor, who married Malvina Dinehart; and Sarah Astor, who died in infancy. Astor's paternal grandparents were fur-trader John Jacob Astor and Sarah Cox (née Todd) Astor. His uncle, William Sr.'s elder brother, was occasional poet John Jacob Astor Jr., who never married or had children. His maternal