Marshall Sr. was born June 2, 1897 (source: Social Security Death Index, WWI Draft registration Card)He died November 1972 in Butler County, Ohio in the City of Hamilton. SS# 314-34-4403. He had blue eyes.
I searched those census records as well. I agree that Albert and Louise were his parents and Albert and Orville were his brothers.
The 1930 census record is the one that really tells the story. I believe Marshall remarried Mrs. Edna Fitzpatrick. She had two children from a previous marriage, Carlos (or Carlon)born @ 1915 and Ruth born @ 1917. Is this the "Ruth" that you mentioned. No sign of Norman or Marshall Jr. yet. Elizabeth either died or divorced/remarried. this could be why Marshall Jr. was adopted out. Do you have any other details?
I'm still searching for you..will update if I get more info.