William Taggart Lathrop was born 17 April 1825 in Le Roy, Genesee County, New York, United States to John Lathrop (1794-1887) and Martha Clifford (1792-1837) and died 19 November 1907 Rockford, Winnebago County, Illinois, United States of unspecified causes. He married Sarah Adeline Potter (1836-1909) .
Children
| Name | Birth | Death | Joined with |
| Julia Clifford Lathrop (1858-1932) | 29 June 1858 Rockford, Winnebago County, Illinois, United States | 15 April 1932 Rockford, Winnebago County, Illinois, United States | |
| Anna Hubbell Lathrop (1860-) | |||
| Edward Potter Lathrop (c1863-) | |||
| William Taggart Lathrop (1868-) | |||
| Robert Lathrop (c1870-) | |||
| Ruth Madge Lathrop (1875-) | |||
Siblings
| Name | Birth | Death | Joined with |
| Mary Lathrop (1822-1896) | |||
| William Taggart Lathrop (1825-1907) | 17 April 1825 Le Roy, Genesee County, New York, United States | 19 November 1907 Rockford, Winnebago County, Illinois, United States | Sarah Adeline Potter (1836-1909) |
| Ann Lathrop (1828-1897) | |||
| Whitman Lathrop (1830-1917) | |||
| Julia Lathrop (1835-) | |||