If your user name appeared to be a real first and last name (fictitious or not), your user name has been changed to just your first name. As of May 1, 2018 no full real names are allowed as user names.
When I was small, someone gave me a chocolate covered grasshopper. I had no idea what it was but it was very crunchy. I asked the girl who gave it to me what I just ate. Well, when she told me, I got sick to my stomach.