When Mary Matilda Sill was born on 1 March 1827, in Connecticut, United States, her father, Henry Sill, was 40 and her mother, Almeda Marshall, was 39. She married Oliver Robbins Holcombe on 3 March 1851, in Windsor, Hartford, Connecticut, United States. They were the parents of at least 1 son and 5 daughters. She lived in Windsor, Hartford, Connecticut, United States in 1880. She died on 10 April 1922, at the age of 95.