Amazing! And how very kind of you to post this.
I hope the Korth family will see this. (I am a volunteer researcher, not related.) The Albert Korth at that address (your home) is the brother of Herman W. Korth, great-grandfather of blkbear81.
1940 CENSUS
Fond du Lac, Fond du Lac, Wisconsin
Address: 574 Emma Street <----------------
Albert J Korth 54 b about 1886 Wisconsin, custodian, public school
Ida Korth 60 wife b about 1880 Wisconsin
Alfred E Korth 26
Esther R Korth 23
Evelyn Korth 21
Residence in 1935: same house (a question on the 1940 census)
You can see the original handwritten census record by clicking "Search" at the top of this page. Select 1940 census (free). In 1880 Albert's parents John and Mary Korth lived at 217 Franklin in Fond du Lac.