I am looking for information on my Great Grandfather, Jacob Sajak of Chicago IL. I know he was born in Poland and immigrated to IL around 1910-1920. He married Kathryn Sabula and they had 6 children. If anyone has any information on this name, I would greatly appreciate the help. I do know the name WAS changed when the immigrated here, but I do not know from what. My guesses would be Sajdak, or Zajac. Any help?