Joseph Patrick Kennedy Jr. was a lieutenant in the U.S. Navy. He was a member of the Kennedy family and the eldest of the nine children born to Joseph P. Kennedy Sr. and Rose Fitzgerald Kennedy. During World War II, Kennedy was killed in action while serving as a land-based patrol bomber pilot, and posthumously awarded the Navy Cross.

The Kennedy family is an American political family that has long been prominent in American politics, public service, entertainment, and business. In 1884, 35 years after the family's arrival from County Wexford, Ireland, Patrick Joseph "P. J." Kennedy became the first Kennedy elected to public office, serving in the Massachusetts state legislature until 1895. At least one Kennedy family member served in federal elective office from 1947, when P. J. Kennedy's grandson John F. Kennedy became a member of Congress from Massachusetts, until 2011, when Patrick J. Kennedy II retired as a member of the U.S. House of Representatives from Rhode Island.