In my Family Tree, I have a Robert Graham Mhoon (1855-1935).He was born in Arkansas and died in Senaca, Newton, Missouri. His wife,(Mrs. R.G.Mhoon) was Minerva G. Lankford (1868-1964).She was born in Swars Prairie, Newton, Missouri and is buried with her husband in the Senaca Cemetery. They had 2 boys( Clarence and Leo F.) and 4 girls (Estella, Alta, Carie B. and Leona). I don't know anything about Leona other than she was born in May 1898.
R.G.'s Father, Stark Mhoon (my GGGGrandfather) died in 1888 in Newton Co. and he left a lot of kids in and around Senaca.