I found couin Clarence O. Haley, son of Andrew Frank and Emma (Leonhard) Haley, in the 1920 census of Chicago, Cook Co., IL. He was living on Clifton Park Ave. in the 12th ward and his occupation was a physician.
He married Julia M. ________ who was born ca. 1889 Illinois and whose mother and father were both from Germany.
Clarence and Julia had a son, William L., who was 1 year 2 months old at the time of the 1920 census.