Richard Castellano died from a heart attack at the age of 55 in 1988. Richard Castellano is known for playing Clemenza in Godfather 1. This is assuming your question contained a typo adding an extra "a" to the last name. For more go to: http://en.wikipedia.org/wiki/Richard_S._Castellano
As of December 30, 2013, Richard Clayderman is still alive.
Richard Hamilton was born in 1922 and is still alive
Richard Long, born on 2 Jun 1945, is still alive.
Yes, he is alive.
Richard Benjamin (if you meant him and just screwed up his name) is still alive.
Yes
Yes, Richard Leakey is still a live today
Yes Richard Clayderman is alive , he lives in Normandy with his wife and son.
Richard Hatcher is currently still alive.
Yes
yes!
yes?