I was just wondering if they were his children because a lot of times, Charles isn't listed with the other children and I don't know why that is. John... or Johann Schlottmann as I think he was known before he came to this country... is also buried at Walnut Mound. I believe it is he who changed the name to Schlottman from Schlottmann. Lina is a shortened version of Carolina. She's buried next to John at Walnut Mound. There is a photo of their stone attached.
Charles Schlottman was born in 1873, died in 1961, and is buried at Elm Lawn Cemetery in Elmhurst, Illinois. He was married to Grace Barker. They were parents to Madeline (Holliday), Donald, Evelyn (Sinibaldi), Fred and Ernest. Fred died when he was 8 years old. Charles drank water from a creek and got typhoid and became deaf.
I have found a relative on the Internet who is great-grandson to Friedrich and he doesn't know if he is buried in a cemetery or on a family farm.
Most of these people I have talked about are on findagrave.com.
Are you related to any Schlottmans?