When Marie Catherine Soulier was born on 13 December 1763, in Pramollo, Turin, Piedmont, Italy, her father, Jean Soulier, was 38 and her mother, Martha Gallian, was 33. She married Jaques Balmas on 9 January 1786, in San Germano, Turin, Piedmont, Italy. They were the parents of at least 7 daughters. She died in 1805, at the age of 42.