This made me laugh out loud.
Back on the subject. There are so many suggestions people have given the OP but I don't think that was the point of this thread. I mean, I do get it, it sucks to have to change your name, but you have a lot of options. Add an apostrophe, add a last name to Shayde, add letters to it... Honestly if people "know" you from your internet legacy that you've left in all your other games played as Shayde, I'm sure if they see "Shayde Greyface" or whatever they will come up to you and say "OMG are you the legendary Shayde I grouped with in Ultima Online in 1998?!" and all will be well in the world. You don't have to go from Shayde to Frank where no one will recognize you. Even from an in-character stand point you can write up a whole reason why Shayde suddenly finds out his last name or is reborn, etc (or goes undercover haha).
I mean, you even mentioned that your kids went through the transfer and were fine with it... Maybe take example out of that if anything.