Calvin Coolidge, Jr.

Youngest son of President Calvin Coolidge.

http://en.wikipedia.org/wiki/Calvin_Coolidge%2C_Jr.

Calvin Coolidge, Jr, was born in Northampton, Hampshire County, Massachusetts, on April 13, 1908 and was the youngest of the two children of Calvin Coolidge (1879–1933), the 30th President of the United States (1923–1929) and Grace Anna Goodhue (1879–1957), First Lady of the United States from 1923 to 1929. His father became President of the United States upon the death of President Warren G. Harding in 1923, when Calvin Jr. was fifteen years old.

On the afternoon on June 30, 1924, he engaged with brother John Coolidge in a game of tennis. Because he wore tennis shoes without socks, Calvin Jr. developed a blister on his right foot, which progressed into blood poisoning and was the cause of his death on July 7, 1924, less than three months after his sixteenth birthday. His brother, John, described the loss of his brother as producing a depression in President Coolidge that lasted the rest of his life.

Coolidge attended Mercersburg Academy in Mercersburg, Pennsylvania and would have graduated in 1925.