Unless you’re following an ethnic theme I would avoid anything foreign. People won’t know how to spell it or pronounce it, won’t be able to find you online, and there is a good chance you’ll offend people if they think you’re appropriating their language or culture. Besides which if you don’t speak those languages natively there is a decent chance there will be connotations or contexts where it may need something you don’t expect or even homophones that could damage your reputation.
One example, in Japanese Tamako is a girl’s name which in one reading would translate to “jewel child” somewhat equivalent to the English name “Jewel”. The -ko suffix means child so someone might just decide, “Okay, I’ll just use the name “Tama.” The problem is that if it is spelled with a different character, “Tama” means “round” and “Tama” is a common name for a pet cat.
It’s very difficult to get a good name out of a single word because it’s low hanging fruit and most of them got picked 20 years ago when the Internet boom was just starting. Heck I’ve Googled my own nickname and there are at least two other people using it too.
Your best shot is probably a compound word of two words that don’t currently go together. Strangely I’ve found that the “Engrish” phrases using in foreign songs, slogans and shirts can give you ideas on a new turn of phrase. Sometimes it gets a little weird though. “Pray to the gods of Bomex your speed over rival.”
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