Petrus Thomas Ratajczyk is a pretty obviously non-English name. Unless you're eastern european, this will look weird, and it'll likely embarrass you. Also, the whole taking full names thing isn't a good idea. Not just for legal purposes, but just because it'll cause a lot of confusion. You could try changing it a bit, Petrus to Peter, Patrick, Pedro, Pascal... there's so many names. I mean, you can do what you want, but why take someone's ENTIRE name? It's better to stay true to yourself and not copy another person that far.