Otto Hawn was born 18 July 1879 in Bollinger County, Missouri, United States to Aaron Madison Hawn (1851-1901) and Nannie Ada Hevrin (1861-1936) and died 24 July 1930 Little Rock, Arkansas, United States of unspecified causes.
Children
| Name | Birth | Death | Joined with |
| Edward Rutledge Hawn (1908-1982) | 28 September 1908 Little Rock, Arkansas, United States | 7 June 1982 Los Angeles, California, United States | Laura Steinhoff (1913-1993) |
Siblings
| Name | Birth | Death | Joined with |
| Otto Delphia Hawn (1879-1930) | 18 July 1879 Bollinger County, Missouri, United States | 24 July 1930 Little Rock, Arkansas, United States | Claire Estelle Johnson (1881-1969) |