The records I have for this particular Jan Tomczak, are for around 1905. It states that he, his wife and one child reside on this land. Do you perhaps know approx. when your G.grandfather arrived in the US? We are currently researching a group of Tomczak brothers and sisters that came to Canada and the US between 1892 and 1914. However the Jan in our family was married to a woman named Marya, so I don't think it is the same family, or at least not the same generation. Do you have any birthdates or anything, that is always a help as everyone in the Tomczak families seemed to be named after a relative, so it becomes difficult to trace without ages...Best of Luck to you!