In the Chicago Catholic Churches I find the change to James, and other names Americanized, appearing about 1914/15. I have found baptism records which state Vaclav on one bapt and Wences on another. St Wenceslaus Church used the term "Wenceslaus" almost exclusively for Vaclav and interchanging was a normal procedure of the scribe as many scribes wrote in the record books through the years. Some surnames changed from baptism to baptism with a few letters or in some cases where the scribe wrote the "new" name in parens above the other--similar to the original but simplified. It is interesting. Joan Smart Peterson