Daniel is the son of John Stanley and Sarah (last name unknown).
The following is a biography published by the New York Genealogical Society and may have the incorrect birthplace (unsourced in the society web site). Additionally, the bio indicates he is the son of Jonathan, which is incorrect (see Stearns, Ezra, 1875 source below)
Daniel Stanley, son of Jonathan, was born in Rutland, Vt., in 1775, and about 1804 removed to Rutland, in this county. He married, first, Rebecca Taylor, in 1799, and their children were Sally (Mrs. Evelyn Williams), who died in Ohio in 1887; and Harriet (Mrs. Russell Phillips), who died in 1837. Mrs. Stanley died in 1805, and in 1809 he married Esther Scott, by whom he had five sons and three daughters, viz.: John M., of Adams; Rebecca A. (Mrs. F. B. Hollet), deceased; Fayette, also of Adams; Alexander D., who died in 1885; Orestes M., Viola O. (Mrs. Asa Lyon), and Rollin S., also of Adams; and Ellen A., who died young. Daniel Stanley located in this town where Orestes M. now resides. Alexander D. Stanley, born in 1819, married Mary Benjamin, by whom he had three sons, viz.: De Forest, born in 1847; Charles B., born in 1852; and Homer D., born in 1859. De Forest, who was reared on a farm, married Florence A., daughter of Percival and Catharine (Walrath) Bullard, of Theresa, in 1871, by whom he has one son and two daughters, viz.: Frank B., born in 1875; Lillian P., born in 1879; and Mary C., born in 1886. Charles B. Stanley married Jennie, daughter of H. S. and Betsey (Snell) Howard, in 1885, and they have a daughter, Blanche, born in 1886. He is a hop grower and proprietor of the Valley Stock Farm, on road 20, where he breeds fine trotting horses.
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