The accent will be on the second syllable.
In the US, we mispronouce Russian names as a rule.
For instance, we say VLAD im eer, when the Russian pronounciation is Vlad EEM er
Ivan Ivanovich is ee VAHN eeVAHN o vich
Boris is actually Bor EES
Pe TROV ski
So, your saint is Kor NEE lee