Elijah Willard Lathrop was born 29 January 1842 in Bozrah, New London County, Connecticut, United States to Elisha Lathrop (1808-1855) and Charlotte Avery (1815-1884) and died 19 November 1929 of unspecified causes. He married Eliza Gifford Pierce (1855-1927) .
Children
| Name | Birth | Death | Joined with |
| James Elijah Lathrop (1876-1938) | 12 March 1876 Bozrah, New London County, Connecticut, United States | 21 February 1938 Bozrah, New London County, Connecticut, United States | Belle Williams Austin (1876-1954) |
| Charlotte Lathrop (1880-1967) | |||
| Grace Lathrop (1884-) | |||
| Earl Chappell Lathrop (1887-1947) | 20 May 1887 Montville, New London County, Connecticut, United States | June 1947 | Christine Tinker (1890-1975) |
| Lawrence N. Lathrop (1899-1967) | |||
Siblings
| Name | Birth | Death | Joined with |
| Charles Nelson Lathrop (1834-1863) | |||
| John Avery Lathrop (1836-1880) | 17 March 1836 Bozrah, New London County, Connecticut, United States | 1880 Preston, New London County, Connecticut, United States | Sarah Thomas (1839-1880) |
| Harriet Parthena Lathrop (1838-1906) | |||
| Janet Ruhamah Lathrop (1839-1928) | |||
| Abby Ann Lathrop (1841-) | |||
| Elijah Willard Lathrop (1842-1929) | 29 January 1842 Bozrah, New London County, Connecticut, United States | 19 November 1929 | Eliza Gifford Pierce (1855-1927) |
| Elisha Lathrop (1842-) | |||
| Hannah Maria Lathrop (1845-1932) | |||
| Henry Lathrop (1846-) | |||
| Mary Ellen Lathrop (1848-1866) | |||
| Lebbanus L. Lathrop (1850-1929) | |||
| Francis Lathrop (1853-1932) | |||