Piz Quattervals?

We have admired this beautiful peak looking down on our house, since we arrived in the Engadine; it has been top of my list of peaks to climb around here, I have blipped it quite a few times and we have told everybody who would listen that it is called Piz Quattervals. However, embarrassingly, it isn't called Quattervals at all but rather Piz d'Esan, Quattervals is hidden from view behind it! Dah! As for climbing it', it guards the Swiss National Park and it is forbidden to step foot on it, never mind make an ascent; which is romantic but frustrating especially as I look at it everyday!