Mr. Kerwin, Thanks for your response. I am very much aware of the information that you have provided to me. I have been trying to find these people on both the 1890 and 1900 US Census.My understanding is that the 1890 Census has just about all been destroyed.On the 1910 Census, it shows their immigration date as 1880.My grandfather, Michael John Nowak, has Pete and Kate listed as his parents on his 1930 death certificate. He also indicates on a 1910 US Census, taken in Fort Worth, Texas, that he came to the USA in 1880. To be absolutly sure that they are all related, I will have to either talk to someone with this direct knowledge or find them all possibly listed together on the 1890/1900 US Census.