Latinizing my name.

In a fit of pretention, I have decided to learn a little Latin to impress the ladies and make the menfolk jealous. Not really, but my reasons are ego-based anyways. Since Nostradamus and Linnæus did it, I’m gonna do it too, so how would I start? Steven Williams is written on the birth certificate, and I haven’t the foggiest notion of how to Latinize it so I can inflectimaficate it more easily. Are there specific rules for the transformation of a name from the native language to Latin? Latin-speaking Dopers, if it pleases you?

Well, Stephen would be Stephanus, and William (although not necesarily Williams) would be Guilielmus.