Marybelle Proctor was born in February of 1906 in Tucson, AZ. She attended Sacred Heart Academy with her sister. In the 1930 census she is listed as a dental assistant, living with her mother and a boarder. She was married in 1946 to Fred Wielang in Nogales, AZ. Fred had a daughter from a previous marriage that Mary helped raise. For sometime they owned and operated the Wielang Meat Market on 1st Ave in Tucson.
Marybelle Proctor-Wielang died in Tucson, AZ in December of 1990.