If you changed your name, how did you decide on what to change it to?

Hi! I'm a young adult recently diagnosed with DID.

For personal reasons, I have wanted to change my name for a while, but I've been struggling the past two years with trying out different names and finding them all wanting. Different people in my system want different names, and sometimes all the names blend together and make my dissociation worse. My therapist advised me to find an "umbrella name" that we could all go by as we navigate life, but I don't know where to start to find that, if I'm being honest. Idk, does anyone here have similar experiences?