The grave of Kathleen Kennedy at Edensor. She was the daughter of Joe Kennedy and married William Cavendish in 1944. He was shortly to die in the war, and she not so long afterwards in a plane crash.

There's also just in front a stone commemorating a visit to his sister's grave by John F Kennedy in June 1963, just five months before he died (pic in originals gallery).

When all is said and done, we all travel the same passage.

http://en.wikipedia.org/wiki/Kathleen_Cavendish,_Marchioness_of_Hartington

(BTW my wife is fascinated by the Kenndy's!)