When Mary Altomare was born on 15 May 1884, her father, Giuseppe Altomare, was 36 and her mother, Rosina Naccarato, was 36. She married Giuseppe Bossio on 12 February 1901, in Priest River, Bonner, Idaho, United States. They were the parents of at least 4 sons and 6 daughters. She lived in Priest River, Bonner, Idaho, United States for about 20 years. She died on 14 January 1944, at the age of 59.