Robert Mothersbaugh was born 23 September 1925 in Woodward, Pennsylvania, United States to Allen Curtis Mothersbaugh (1900-1962) and Alice Emma Wilkinson (1899-1970) and died 22 May 2016 Akron, Ohio, United States of unspecified causes.
Children
| Name | Birth | Death | Joined with |
| Mark Allen Mothersbaugh (1950) | 18 May 1950 Akron, Ohio, United States | Anita Greenspan (1964) | |
| Robert Leroy Mothersbaugh (1952) | |||
| James Michael Mothersbaugh (1954) | |||
| Susan Marie Mothersbaugh (1955) | 19 September 1955 Akron, Ohio, United States | Joseph Anthony Hite (1955) | |
| Amy Marie Mothersbaugh (1962) | |||
Siblings
| Name | Birth | Death | Joined with |
| Robert Leroy Mothersbaugh (1925-2016) | 23 September 1925 Woodward, Pennsylvania, United States | 22 May 2016 Akron, Ohio, United States | Mary Margaret Ratzer (1924-2014) |