William was the son of Gustav Carl and Bertha Niske Kummerow. On Sept 24, 1910 he married Ella Alma Sophie Hahn in Lake City, Indiana. They had 2 children, Richard William and Dorothea Bertha Harriet. On Nov 6, 1918, he married Angela "Nellie" Leschak in Chicago, Illinois. From that marriage two sons were born,Gordon who died at the age of 19 days and Wilbur Francis. William was in the lumber business.