What sister of a longtime Senator from Massachusetts married Peter Lawford?
Patricia Kennedy Lawford: Patricia Helen "Pat" Kennedy Lawford (May 6, 1924 – September 17, 2006) was an American socialite and the sixth of nine children of Rose and Joseph P. Kennedy Sr. She was a sister of President John F. Kennedy, Senator Robert F. Kennedy, and Senator Ted Kennedy. Ted Kennedy: Edward Moore "Ted" Kennedy (February 22, 1932 – August 25, 2009) was an American politician and lawyer who served as a United States Senator from Massachusetts for over forty years from 1962 until his death in 2009.
Patricia Helen "Pat" Kennedy Lawford