What presidents son died during World War 1?

Three US Presidents had sons who died during their terms.

President Lincoln's son, Willie Lincoln, was the only president's son to die in the White House, in 1862.

He was 12 years old.

President Coolidge's son, Calvin, died less than a year into his father's presidency, in July, 1924.

He was 16 years old.

President Kennedy had a son, Patrick, who was born prematurely and died on August 9, 1963.

He was only 2 days old.