Maria Theresia was born on September 2nd, 1803 in Lummen. Maria Theresia's father was Paulus Adrianus Aerts and her mother was Marie Anne Aerts. Her paternal grandparents were Petrus Aerts and Christina Lemmens. She had a brother named Carolus. She was the younger of the two children. She died at the age of 62 on June 13th, 1866 in Lummen.