I use a pen name because I'm so private, but it keeps changing because I'm so indecisive. It started as Madison E. Reuven, then became Madison B. Reuven, then back to E, and now it might become Madison Rachel de Wentworth or some variation.
I want to legally change my first and middle names. I know I decided on Madison as a first name. At first, it was Madison Erin, and then I signed up for NaNoWriMo as MadE9. Then, I chose Madison Brooke, so I changed my pen name to MBR. Finally, I am choosing Madison Rachel, but I don't want to be Madison R. Reuven because that's too many R's, so I chose de Wentworth after the oldest ancestor of mine I could find, Rynold de Wynterwade (also called Reginald de Wentworth). I decided to use Rachel instead of just an initial to get used to the name and because using an initial then a 2-part surname looked kind of weird.
I chose Reuven as the original name because that was part of my Hebrew name.