I found this when I was looking for the info on the Tiffany boxes
Three sets of remains, three American flags and three wreaths with red, yellow and white flowers were brought aboard the Briscoe for the ceremony honoring Kennedy, 38, his wife, Carolyn Bessette Kennedy, 33, and her sister, Lauren Bessette, 34.
Defense Department sources tell CNN that 17 family members attended the service. The mourners included Kennedy's sister, Caroline Kennedy, his uncle, Sen. Edward M. Kennedy, and cousins Maria Shriver and William Kennedy Smith.
http://www.cnn.com/US/9907/22/kennedy.plane.07/