Jean Frost was born Rachel McKecknie-Simpson, and was born in Scotland. When both of her parents died, she was accompanied by a nanny on a ship to Australia (when she was 3 years old), where she was adopted by her Aunt and Uncle who re-named her Jean Frost. Her approximate date of birth is 1886. She married Claus Dossel (1875-1958) in Queensland, Australia in 1901, and they had 7 children.