Joseph Willard Griffiths was born 29 April 1849 in Ferryville, Pottawattamie County, Iowa to Joseph Griffiths (1816-1860) and Ann Roberts (1819-1895) and died 27 January 1930 Union, Salt Lake County, Utah of unspecified causes. He married Katie Bathsheba McGary (1861-1898) 25 June 1880 in Utah. He married Margaret Bridget Allred (1866-1934) 2 October 1901 in Circleville, Piute County, Utah.
Children
| Name | Birth | Death | Joined with |
| Charles McGary Griffiths (1881-1938) | |||
| Willard Wallace Griffiths (1886-1967) | |||
| Joseph Owen Griffiths (1889-1972) | |||
| Vivian Griffiths (1891-1981) | |||
| Hubert Griffiths (1898-1899) | |||
| Hugo Griffiths (1898-1904) | |||
| Name | Birth | Death | Joined with |
| James Rex Griffiths (1907-1988) | |||
Siblings
| Name | Birth | Death | Joined with |
| Elizabeth Griffiths (1843-1872) | |||
| William Griffiths (1845-1847) | |||
| Mary Griffiths (1845-1917) | |||
| Ephraim Griffiths (1847-1920) | |||
| Hyrm Griffiths (1849-1849) | |||
| Joseph Willard Griffiths (1849-1930) | 29 April 1849 Ferryville, Pottawattamie County, Iowa | 27 January 1930 Union, Salt Lake County, Utah | Katie Bathsheba McGary (1861-1898) Margaret Bridget Allred (1866-1934) |
| Jacob Heber Griffiths (1851-1935) | |||
| David Henry Griffiths (1851-1853) | |||
| Emma Jane Griffiths (1853-1853) | |||
| Sarah Ann Griffiths (1853-1939) | |||
| John Edward Griffiths (1855-1857) | |||
| Martha Jane Griffiths (1857-1861) | |||
| Brigham Griffiths (1859-1937) | 9 April 1859 Union, Salt Lake County, Utah | 16 July 1937 Salt Lake City, Salt Lake County, Utah | Malinda Jane Allred (1861-1945) |
| Evaline Griffiths (1861-1861) | |||
| Rachel Griffiths (1861-1876) | |||
| Name | Birth | Death | Joined with |
| Josiah Griffiths (1855-1858) | |||
| Lucy Ann Griffiths (1857-1933) | |||
| George Henry Griffiths (1858-1862) | |||