This kind of stuff is really interesting!
Um, my username here is the name of the first TLK fan character I made, when I was about 10 or 11. I literally just made it up, haha, I wanted something that sounded TLK-ish. If you google it's mostly me, but it seems there's also a couple other people with the name Sombolia on the internet, which is weird. I don't think it means anything in any kind of language, so it must be a coincidence.
Anyway, the character used to be my fursona, but I don't really use her anymore. I just use the name because it's what people know me by.
It's pronounced pretty much how it looks: som-BOL-ee-uh.