Chauncellor "Chauncey" John Olcott, b. 21 Jul 1859 in Buffalo, Erie County, New York, d. 18 Mar 1932 in Monte Carlo, Monaco, son of Melon W. Olcott & Margaret Brennan. He married Caroline M. Armstrong (1st wife) on January 17, 1884 in Philadelphia, Philadelphia County, Pennsylvania. He married Margaret O’Donovan (2nd wife) on September 28, 1897 in Salem, Essex County, Massachusetts.
Cornelius Olcott, b. 21 Jan 1828 in Jersey City, Hudson County, New Jersey, d. 3 May 1897 in Brooklyn, Kings County, New York, son of James S. Olcott & Sarah Batcheler. He married Katherine M. Van Duzer on March 30, 1852 in Jersey City, Hudson County, New Jersey.