I am not certain that this census record is for the same Louis DIEFENBACH. The immigration years are different (1910 shows 1890; 1920 shows 1893), and the ages are off (1910 shows him to be born about 1850, and age 60; 1920 shows brith about 1857 and age 63). The Census Wards are different, too, but the 1910 shows him living with Carl Joseph DIEFENBACH, and the 1920 Census shows Louis and Margaretha living in their own home by themselves. I need to see the actual census images.
1. Carl Joseph DIEFENBACH (ID:I231), b. 04 Mar 1884, Frankfurt, Hesse, Germany , d. 30 Sep 1950, 391 S 6th St, Columbus, Franklin County, Ohio, USA (Age 66 years)
[S336] Death Certificate - Diefenbach, Carl Joseph.
[S220] 1920 Census of Columbus, Franklin County, Ohio ED 39; Sheet 8B, Columbus Ward 3; Franklin County, OH; Roll T625_1380; Page 3B; Enumeration District 71; Image 1274.
[S503] Alien Immigrants Manifest, SS Munchen, 25 May 1893.
[S220] 1920 Census of Columbus, Franklin County, Ohio ED 39; Sheet 8B, Columbus Ward 3; Franklin County, OH; Roll T625_1380; Page 3B; Enumeration District 71; Image 1274.
Living with her son Carl Joseph DIEFENBACH
[S219] 1910 Census of Franklin County, Columbus City, OH, Columbus Ward 2, Franklin County, OH; Roll T624_1180; page 10A; Enumeration District 46; image 711.
[S219] 1910 Census of Franklin County, Columbus City, OH, Columbus Ward 3; Franklin County, OH; Roll T625_1380; Page 3B; Enumeration District 71; Image 1274.