help abou name

my brother's name is Uroš (pronounced u-r-o-s-h) but I'm not sure is it possible to translate in Japanese (katakana)? the meaning of the name is (little) master,i can find that in kanji (sensei). but i want to find about about name. i need it for a tattoo. Btw :) I'm in love in Japanese language and Japan :))) thanks in advance

I would katakana-ize it this way:
ウロシ　(u-ro-shi)
or
ウロシュ　(u-ro-shu)

thanks so much,u really helped.
i have one more question.i found on internet that Stefan is ステファン that is correct,right?

Yes, it is.

i found on internet that Stefan is ステファン that is correct,right?

Depends on the pronunciation of Stefan. If it is the German pronunciation, the katakana version is シュテファン

its steh-fahn. so ステファン is what i need :) thank u guys!