My current username is a mix of two parts; the first I believe was inspired from
Aster flowers as purple was my favorite color back in the day and the second half was just because I liked how "lee" or "lie" sounds, so I tacked it on the end, making "Asterlie". These days I use
a different meaning for "aster" - instead of flower, I think of it as meaning "star".
My oldest username that I can remember was "WildKatz", and I believe I was knee deep in my Warrior cats obsession and I wanted to be quirky, so I spelled "wild cats" differently

The one before I chose Asterlie was "Wildstar9" - I was still in my Warrior cats phase and I thought I was unique for picking the name "Wildstar" until I realized someone else picked it, so I tacked on a 9 since it was easy for me to remember