When Frederick Curtis Kennedy was born on 17 July 1829, in Bolton, Chittenden, Vermont, United States, his father, Samuel Barnett Kennedy, was 40 and his mother, Hannah Moseley Morse, was 31. He married Mary Amelia Arrowsmith Mason on 5 April 1858, in Colchester, Chittenden, Vermont, United States. They were the parents of at least 3 sons and 1 daughter. He lived in Vermont, United States in 1870 and Burlington, Chittenden, Vermont, United States for about 20 years. He died on 16 January 1913, in Brattleboro, Windham, Vermont, United States, at the age of 83, and was buried in Greenmount Cemetery, Burlington, Chittenden, Vermont, United States.