PATTICAKE on Family Tree Circles

My Grandfather was Frank Lentz. He married Minnie Rathke in Milwaukee, Wisconsin on August 10, 1907.

Minnie was the daughter of Fred Rathke and Bertha Riebe Rathke. Minnie died approximately one year after they were married. I have been unable to find death records on her. I also do not know if Minnie was her real first name or if she was actually a Wilhelmina! She is listed as Minnie on their marriage certificate.

Emil Lentz was my Great-Grandfather. He was born January 7, 1863 in Germany and died July 8, 1944 in Milwaukee, Wisconsin.

I am trying to find all of his siblings. I know he had a brother named Adolph who owned the A. Lentz Lumber Company in Wauwatosa, Wisconsin. He also had a brother named Gustav Lentz who was born around 1850 and died on September 23, 1903. In Gustav's death notice, a sister was also mentioned. Her name was Mrs. Chas. Radtke.