When Mary Jane Shaver was born on 4 April 1867, in Winchester, Dundas, Ontario, Canada, her father, John Adam Shaver, was 54 and her mother, Maria Elizabeth Swerdfeger, was 45. She married Peter Rossman Marcellus on 25 December 1889, in Morewood, Winchester, Dundas, Ontario, Canada. They were the parents of at least 4 sons and 7 daughters. She lived in Dundas, Ontario, Canada for about 10 years and Russell Township, Russell, Upper Canada, British Colonial America in 1920. She died on 7 April 1920, in Russell, Prescott and Russell, Ontario, Canada, at the age of 53, and was buried in Morewood, Winchester, Dundas, Ontario, Canada.