I'm sure I've read somewhere, probably in the copious oeuvre of Colin Wilson, that the wife of Nicolas Flamel is supposed to have copped for eternal life along with her hubby when he discovered the Philosopher's Stone (I wonder if that marriage is still going strong?).
Am account of Flamel is at http://www.alchemylab.com/flamel.htm (although that link says that the wife died).
Am account of Flamel is at http://www.alchemylab.com/flamel.htm (although that link says that the wife died).