When Susie Grace Agnew was born on 12 July 1898, in Durban, KwaZulu-Natal, South Africa, her father, George Harry Augustus Agnew, was 32 and her mother, Marilla Ann Smith, was 30. She married Joseph Frederick Dawn Heath on 1 February 1921, in Durban, KwaZulu-Natal, South Africa. They were the parents of at least 1 son and 1 daughter. She died in November 1980, in Pompano Beach, Broward, Florida, United States, at the age of 82.