Peter
From the Latin for 'rock'.
Alternatives: Pete, Petey, Pietor, Pytor, Petr, Pieter, Piotr, Pietro, Pedro, Pierre, Piers, Pierce, Peer, Pero, Piero, Peder, Per, Peadair, Petrus, Peterson, Perrin, Perkin, Perkins, Parnell, Parle, Parkin, Parkinson, Petrie, Petri, Pierson.
Namesakes: St Peter, Peter the Great, Peter Sellers, Peter O'Toole, Peter Tatchell, Pete Townshend, Peter Mandelson, Pierre Trudeau, Pierre Boulez, Pierce Brosnan, Oscar Peterson, Peer Gynt.