Coolidge was born in
Boston, Massachusetts, on July 4, 1863. He was the second of five sons born to
Harvard Law School graduate Joseph Randolph Coolidge and Julia (
née Gardner) Coolidge, both from prominent and wealthy
Boston Brahmin families. His siblings included professor and diplomat
Archibald Cary Coolidge, noted lawyer
Harold Jefferson Coolidge Sr. (the father of
zoologist Harold Jefferson Coolidge Jr.), architect
J. Randolph Coolidge Jr. and mathematician and professor
Julian Lowell Coolidge. His paternal uncle was
Thomas Jefferson Coolidge, the Boston businessman and
U.S. Minister to France. His father, Joseph Randolph Coolidge, was a great-grandson of the 3rd United States President
Thomas Jefferson, through his maternal great grandparents,
Thomas Mann Randolph Jr. and
Martha Jefferson Randolph. John's great-uncles were
Thomas Jefferson Randolph,
George Wythe Randolph, and his grandfather,
Joseph Coolidge, was a distant relative of President
Calvin Coolidge. Through his mother, John was the nephew of
John Lowell Gardner II and his wife
Isabella Stewart Gardner. His mother and uncle John were the grandchildren of merchant
Joseph Peabody, one of the wealthiest men in the United States at the time of his death in 1844. In 1884, Coolidge, like all of his brothers, graduated from
Harvard University. In 1887, he traveled to east for a total of three years, living in Japan and traveling to China, India, Thailand and Malaysia. From 1890 to 1894, he lived in Brazil where he was a first hand witness to a period of vast political developments and a six-month fight between the
Brazilian Army and Navy in the
Bay of Rio. ==Career==