I am also researching the Kristofeks. I have John Kristofek (b. 24 May 1874, Austria, to Annie Hadzima & ? Kristofek), arrived in the US 22 Feb 1892, and lived in Pittston, Pennsylvania, Crystal Falls, Michigan, and Chicago, IL. Many family members also settled in Plainfield, WI. Married Mary Povlick (Pavlick) 22 Sep 1900 in Crystal Falls. John worked in the iron ore mines of Mich. They had 12 children. At some point the surname spelling was changed to Christopher. John has at least 2 siblings: Sam & Joe. I would be very interested in exchanging information.
Best Regards, Barb