Proper names 

I saw that someone had gone through the article and changed everybody's first names to the Polish equivalent.  I went and re-checked my books to see how the first names are listed in the English-language biographies, and have put the names back to English versions.  This means "George" not "Jerzy", "Joseph" not "Jozef", "Charles" not "Karol", etc.  

If someone can point me to an English-language book that uses the Polish spellings, please let me know.  To my knowledge I own every single one of them, but if there's one I missed, I'm very interested in knowing about it.  In the meantime, we stick with the form of the names that is used in the published biographies. Polish spelling = Polish Wikipedia.  English spelling = English Wikipedia.  Capiche?