What was Sargent Shriver’s relation to John F. Kennedy? July 22, 2020January 17, 2012 by Pamela Landy Sargent Shriver, director of the Peace Corps during John F. Kennedy’s term (1961-63), was Kennedy’s brother-in-law. Related Answers Who was the first director of the Peace Corps? Was the John Davidson who appears in old movie credits any relation to TV’s John Davidson? How old was John F. Kennedy when Marilyn Monroe sang “Happy Birthday” to him? By what percentage of the popular vote did John F. Kennedy beat Richard Nixon in 1960? How long after John Kennedy Toole’s death was A Confederacy of Dunces published? How were Samuel, John, and John Quincy Adams related?