I had a made up name that I used online (don’t feel any particular attachment to it now), and 20 years ago the advice was to use a name in the top 10 or 20 for your birth cohort to blend in more easily, so that’s what I did. I let my parents pick my middle name, as an olive branch over transitioning; it didn’t get them to use the right name or pronouns, but I still like the name or I wouldn’t have used it.