Why did Kostya Tzyu change his name?

[abdiel2k3]

its obvious
just cuz it has be to be a quick catchy name
lots of guys dont fight with thier birth name
Zab is really Zabdiel
that ****s just plain awsome
so if i tuned pro id have to become
Ab

[The Troll]

Konstantine is fairly common Russian name I think, I was watching this movie called "the beast" about a Russian tank crew stranded in Afghanistan with a psycho tank commander and one of the guys names was Konstatine. But I agree Konstatine sounds alot better than Kostya. However in Russian I think when using the Latin alphabet there is a Y in there so its spelled like Kostyantine or something. I saw it spelled that when when he was introduced in one of his amateure fights.