Alderaan is Aldergone, Pumpkin (pie)
A few points of interest here (read: personal fan-theory incoming): Vader is so blinded by Leia's gender and political position when she's his prisoner that he doesn't notice she's his daughter. He can sense it through the Force, though, whether he consciously recognizes it or not; This explains why he is so adamant about keeping her alive on the Death Star ; When she screams What? and tries to go after Grand Moff Tarkin (I'm going to just assume she was going to claw out his eyes), Vader restrains her with one hand on her shoulder. That is the closest Leia Organa ever gets to a hug from her biological father; All of this is probably going through Vader's mind as he watches his son tortured by the Emperor, years later, just after learning that he's got a daughter, not just a son; He turns on the Emperor to save his daughter, not his son, because whatever, Luke had some training and could - for better or worse - take care of himself (kind of); Luke ...