I am looking for information on the following Dedic line:

My Great Grandfather was named Joseph J. Dedic, born 1863 in Bohemia. He came to the U.S. about 1882/1883. His wife was named Marie and they settled in Cook County, Chicago, Illinois.

Joseph and Marie had a number of children including Anne, John James, Joseph F., Frank J., and Marie. Children were born in the U.S.

My Grandfather was John James Dedic and wed Elizabeth Steinhorst. John and Elizabeth had two children named Raymond and Doris. After John died in Chicago, Elizabeth moved to California. Her children followed her.

Raymond is my father.

I am looking for more history on Joseph and Marie and relatives. Also any details of Dedic heritage from Bohemia are greatly appreciated.