1920 census, Cincinnati, Hamilton co., 21st ward,ED#378:
Western Ave.
Albert Ruehrwein,40yrs, b.OH, Parents b OH, conductor street railway
Mayme , 35yrs., b. OH, Parents b Germany
Margaret, 11yrs. b OH
Albert Jr.. 10 yrs., b OH
Helen, 8 yrs, b OH
(Mayme was a frequent nickname for Mary)
Follow up with Mary's obit, cemetery etc to obtain for Albert.