Side note, I just watched "The Christine Jorgenson Story" at 2 AM on Friday...dumb snow.
Here's how I look at it...when someone gets a sex change, they legally change their name. If I became 33boy, 33girl would no longer exist, so neither would my membership in my sorority.
Regarding legacies, though, if the person made a stink, they would probably consider the children legacies just to make things easier all around.