| Father | Ambrose Boyle Milligan (1888 - 1959) |
| Mother | Reta May Peabody (1891 - 1975) |
| Sibling | Philip Herbert Milligan (1913 - 1997) |
| Sibling | Minnie May Milligan (1916 - 1993) |
| Sibling | Harold Ambrose Milligan (1917 - 1993) |
| Sibling | Sabon Peabody Milligan (1919 - 1988) |
| Sibling | Carl Elbridge Milligan (1921 - 2004) |
| Sibling | Earl Elwin Milligan (1923 - 2013) |
| Sibling | Shirley Reta Milligan (1924 - 2013) |
| Sibling | Allie Warren Milligan (1926 - 1950) |
| Sibling | Loring Alvin Milligan (1927 - 1996) |
| Sibling | John Fairfield Milligan (1929 - 2011) |
| Sibling | Nellie Florence Milligan (1931 - 2015) |
| Sibling | Barbara Audrey Milligan (1932 - 2003) |