Hard to really discuss where Sarbelas came from..
I've been using the name ever since I got my hands on my first pc. I personally choose the name because my cousin is a published fantasy novelist. In his book titled, "obsedian rule" the protagonist was named Sarbelas. My cousin was a huge role model in my life, so I choose the name to honor him, and it was very unique. I've been using the name for over 12 years.
The name Sarbelas I believe originated from an old Japanese game titled, vanguard bandits, which pretty much played like front mission or final fantasy tactics. One of the main antagonists in the game was Sarbelas.
I find the contrasts very compelling with the name. For one, my cousin used the name to represent light, while the actually first use of the name in a published work represented the dark. I personally would like to compare myself to my cousins protagonist, but unfortunately every person has a form of darkness in them.
That is why I picked the name, and why I find it so compelling.