Kazaf

I can ensure you that this name is NOT Russian or Eastern European AT ALL! Russian names (and indeed, Eastern European names) sounds very strong and harsh, eg.
Valdimir, Boris, Alexi, Dmitri - all very common Russian male names.
Kazaf sounds like a Middle Eastern, probably from an Arabic origin. In fact, a search on the web with the name 'Kasaf' instead gave results from the Hebrew Bible with the same word that is related to the Arabic word, which means -
to make pale/ to turn pale
In the Hebrew bible the word Kasaf usually refers to 'witchcraft' (that's why people turn pale because it scares people!) Check here - http://www.frontiernet.net/~toddlerville/613mitzvot/N34.htm
So it's NOT a name for a person AT ALL! (I know this is also a made up character name in some Chinese movie) Please DO NOT use this word as a name!
Since the word is both Hebrew and Arabic - there are many names that come under those languages that you can find on the web. The most common male name in Arabic is probably Mohammad; the most common male name in Hebrew might be Yusuf.
The two languages have been mixed for a long long time so don't be surprised that one word can appear in both languages!
Cheers!

Kazaf 似東歐／俄羅斯既名