Chad, I don't know why I never responded to you? Carl and Anna Schenk Mahloch were Jacob's parents. Jacob and Anna Maria Lucas were married 16 Nov 1869 I believe. Margaret Mahloch married first Matthia Junk, then later a Mr. Boetz/Bates. They lived on his farm near Carlyle Lake in Illinois. Margaret was buried in the town of Vernon, IL.
Nellie had no native american blood that I know of. Don't know about Matthew Heintz, but I doubt it.
Nellie divorced Matthew Heintz for cruelty in 1942. Later she married an Edward Klubertanz when he was extremely old and evidently on his death bed. Another descendant of Matthew Heintz and Nellie said his grandfather didn't have much good to say about Nellie because supposedly she left behind some of her children when she left M. Heintz. We need to check dates to see if that makes sense per the ages of the children in 1942...Please email me directly to discuss: firstname.lastname@example.org