I wish the Kennedy family no further tragedy.
I have to admit that this sentence in particular sounded kind of odd (and cheesy) to me. I mean, since Ted Kennedy isn't immortal
this "family tragedy" is inevitably going to happen at one point... so this wish is pretty pointless and shallow. Instead, it would make more sense to wish that it doesn't happen
now or any time in the near(est) future.
"Tragedy" (with respect to the Kennedys in particular) does mean that someone dies at his prime in a violent way or of other non-natural causes. Ted Kennedy on the other hand got rather lucky, since he was able to live his life to the fullest (and will hopefully continue to for some more years). His death would be one of the the least tragic in the family though.