John Fitzgerald "Jack" Kennedy had three brothers, all implied in the American policy at the highest stratum levels. The four Kennedy siblings, Jack, Joe, Bobby and Ted, are collectively referred to as "The Kennedy Brothers".
Brothers
The careers of the brothers of John Fitzgerald Kennedy (JFK), 35th President of the United States :
He served as the 64th United States Attorney General (1961-1964) then as Senator of New York who campaigned for the 1968 US presidential election. He was assassinated by Sirhan Sirhan.
They were the sons of United States Ambassador Joseph P. Kennedy, Sr. (September 6, 1888 – November 18, 1969) and Countess Rose Fitzgerald Kennedy (July 22, 1890 – January 22, 1995).
References
Brother of John F. Kennedy Wikipedia(Text) CC BY-SA