This is a possibility, but can't seem to confirm. The 1910 Harlan, KY has Sam and Mary with children. In 1920 Sam is divorced, children are with him.
There is one death record in Harlan, KY of a Cleo Paul, age 2, dau of Sam Paul and Mary Helton. That might be a record you could try to locate, to see if you can confirm the maiden name of Mary?
United States Census, 1920 Harlan, Kentucky
self Samuel Paul M 33y TN Divorced
dau Edna Paul F 15y Kentucky
dau Ava Paul F 13y Kentucky
dau Bertha Paul F 12y Kentucky
dau Hattie Paul F 6y Kentucky
dau Glenna Paul F 3y Kentucky
Kentucky, Death Records, 1911-1955
Death 10 Mar 1914 Harlan, Kentucky
Female age: 2 est birth year: 1912
father: Sam Paul mother: Mary Helton
Really long shot???
Tennessee, State Marriage Index
name: Mary Adilene Helton
event: Marriage 08 Dec 1902 Claiborne, TN
spouse: James Samuel Paul