tl;dr: Last name and first initial.
When I was much younger I was starting up Diablo 2 (around 7-8 years old). My father had me use Wolfn so that I wouldn't spend too much time working on a username. I later abandoned the name for other stupid usernames you would come to expect from a child/preteen (RealBigBad, Bloody Bunny, neisan, ugh... etc.) Later I started wanting a more definite identity and chose Wolfn for it's simplicity, ease of pronunciation, and slight meaningfulness. Wolves in general are also a reoccurring theme for me due to my family name.
When I was much younger I was starting up Diablo 2 (around 7-8 years old). My father had me use Wolfn so that I wouldn't spend too much time working on a username. I later abandoned the name for other stupid usernames you would come to expect from a child/preteen (RealBigBad, Bloody Bunny, neisan, ugh... etc.) Later I started wanting a more definite identity and chose Wolfn for it's simplicity, ease of pronunciation, and slight meaningfulness. Wolves in general are also a reoccurring theme for me due to my family name.