[7]

Early life and family history
John Calvin Coolidge Jr. was born on July 4, 1872, in Plymouth Notch, Vermont—the only U.S. president to be born on Independence Day. He was the elder of the two children of John Calvin Coolidge Sr. (1845–1926) and Victoria Josephine Moor (1846–1885). Although named for his father, John, from early childhood Coolidge was addressed by his middle name, Calvin. His middle name was selected in honor of John Calvin, a founder of the Congregational church in which Coolidge was raised and remained active throughout his life.[8]
Coolidge Senior engaged in many occupations and developed a statewide reputation as a prosperous farmer, storekeeper, and public servant. He held various local offices, including justice of the peace and tax collector and served in the Vermont House of Representatives as well as the Vermont Senate.[9] Coolidge's mother was the daughter of Hiram Dunlap Moor, a Plymouth Notch farmer and Abigail Franklin.[10] She was chronically ill and died at the age of 39, perhaps from tuberculosis, when Coolidge was 12 years old. His younger sister, Abigail Grace Coolidge (1875–1890), died at the age of 15, probably of appendicitis, when Coolidge was 18. 