Jay Gould was "a leading American railroad developer and speculator. He has been referred to as one of the ruthless robber barons of the Gilded Age, whose success at business made him one of the richest men of his era."
In the 1870 census NYC: 35 yrs, broker w Helen 26y, George 7y, Edwd 5y, Helen 2y - all born in NY.
In the 1880 census Tarrytown, Greenburg, Westchester, NY: 44 yrs, banker, w Helen D 41 y, George 17 y, Edwin 15 y, Helen 11 y, Howard 9 y, Anna 7y, Frank 3y - 11 servants.
It may be possible to confirm family relationships with Jay by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: