He married Anna Mae McClelland, who raised chickens in her backyard for him to sell and worked with him in his store. You can see photos of her family and relatives at another blog, the Anna Mae McClelland Photo Archive.
I'll polish this blog after the holidays, but in the meantime, here's a photo of him in his grade school class in Red Bud, Randolph County, Illinois.
On the back, in my mother's handwriting, is:
Carl Rudolph Villiger
3rd from right front row
1904-1905
Born July 24, 1890 Red Bud, Illinois
Moved to St. Louis 1905
E St Louis 1905