I was signing up for a Hotmail account sometime in the early 00’s and somewhere in the terms and conditions I misread that you would have to pay for a proper name. I therefore came up with ‘mrkrndvs’ as an alternative. I assume in hindsight that the ‘cost’ was probably in reference to purchasing a custom domain
Thankfully, I have long forgotten the other iterations of online usernames I used in those halcyon days. I do get pressure now and then to take on a more ‘professional’ username, but for me it is a part of the story of who I am. I feel that I have come to fit it overtime.