It’s not the name I was born with, but it’s the name I live under and have for about a decade. I originally changed my name to Magpie maybe fifteen years ago, because I was part of a forest defense community where everyone took funny names. Then eventually I met people who had grown up being called Magpie because it was short for Margaret. I wanted a more feminine name, so I adopted Margaret.
Killjoy came about because I needed a last name for writing, and I had a bit of a reputation for, well, being a killjoy.
From an old AMA
Oh, should’ve guessed it’s a chosen name