I did not think it was that much of a mystery LOL. Paguylayan.. Lion... rhymes, sounds cool, matches with the pool theme of having "heart like a lion".
I feel bad for guys like Kanichi who one of the commentators during his match wanted to nickname him "Itchy Kanichi", I think after he scratched on a shot maybe.
I think I ended up with a decent nickname, my name is Lazar and a pool buddy of mine has been calling me Laser or Laser Beam for 20 years, and it spread among people in the area. Some guy even said after I beat him "what do you expect when you play a guy called Laser".
Although lately some guys I met recently picked up on something I said when I played some tough shots because I did not feel like moving from where I was standing or missed when I said "I got lazy on that shot" and now some call me "Lazy". Still matches with my name pretty well though LOL.