I'd use whichever pronunciation I preferred. If and when the name is pronounced differently, I'll decide at the time whether or not it's appropriate to make a correction and allow my child to do the same as they get older.
Speaking as someone whose name has a total of 71 variants, and therefore a lot of variant pronunciations, I rarely feel the need to make corrections. In fact, I think the only time I do correct people on the pronunciation of my name is when it's a native English speaker who mispronounces it by altering the central vowel. Other than that, the people who pronounce it differently are generally those who speak English as a second, third, or even fourth language, and I would personally feel incredibly rude if I were to even consider correcting them. I actually think it's quite fun having a name that has so many variants and I'm quite happy for my friends who do speak a different first language to call me whatever comes naturally to them - often, it's almost as though they have a special name for me that no one else does, and I rather like that.
Yeah, yada yada. If I have an AW-gəst
August and people call him OW-guwst, that's fine, and if I have a ROM-ə-lee Romilly and people call her ro-mə-YEE, that's fine too.
Ottilie
http://www.behindthename.com/pnl/116467