Well, I'm in the opposite boat. My daughter's name is Maya, pronounced Mah-yah). I never liked the pronunciation like the month of may. I am German, so maybe biased because of that. But in the end, pronunciation is not only different in various languages, there are also variations within the same language. I have a family friend in the states where the name is more common (she's of Polish heritage, too) and she says it is most commonly pronounced the way I do. But here in Aus, most people think it should be like May. Contrary to what my DH predicted, everybody pronounces Maya's name the way we introduce her.
By the way, i do like the Polish pronunciation of Eva better than the English. But again, I'm biased and I would call her whichever way you tell me to.

Sasa