William Henry Joslyn
- Born November 28, 1835 in Brockport, Monroe County, New York.
- Parents were ISAAC JOSLYN and MARIETTA MINERVA PETERS.
- Married SOPHIA LOUISE BROCKWAY on October 1, 1856. She was born May 16, 1832 in New York; died October 7, 1874 in Bergen, Genesee County, New York. Her parents were EDWIN BROCKWAY and LOUISA A. CAGWIN
- Married MARY ANN DUFF on December 1, 1875 in Rochester, Monroe County, New York. Mary Ann was born August 17, 1856 in Sweden, Monroe County, New York; and died April 1, 1926 in Verona, Oneida County, New York. Her parents were JOHN DUFF and MARGARET MARKEY.
- Died September 19, 1909 in Verona, Oneida County, New York.
CHILDREN WITH MARY ANN DUFF
- MARGARET MEHITABLE JOSLYN, born September 5, 1876; died September 5, 1897.
- WILLIAM HENRY JOSLYN, born August 5, 1878 in New York; died October 21, 1918 in Verona, Oneida County, New York. Married MARY ALICE HUMSTONE on April 19, 1905.
- THERESA MAY JOSLYN, born November 4, 1880 in Sweden, Monroe County New York; died April 22, 1932 in Verona, Oneida County, New York. Married JOSEPH EDWARD FELTS.
- SUSAN MARIETTE JOSLYN, born December 6, 1882 in Churchville, Monroe County, New York; died February 5, 1964 in Gloucester County, New Jersey. Married LESTER ORMAND TODD
- CHARLES ELIAS JOSLYN, born October 31, 1884 in Churchville, New York; died January 14, 1966.