I am looking for my half brother and sister. I really have no information on them. My fathers name was Zygfred Constantine Jazwinski. He was born in Grand Rapids Michigan and joined the navy at a young age. Grandparents names were Peter and Pearl Jazwinski. Peter was born in poland and immigrated here. Pearl was born in michigan. His siblings names were: Peter (?), Tony, Gus, Martha, Patrick (Metody?) and Dorothy. That's all the basic information that I have. I don't even have my half siblings first names or where they might have lived when our father was still with them. I'm 50 years old so that would make them around 50+. Any and all information will be appreciated.