David was born 9/20/1808 in Westmoreland Co., PA, he maried Judy Lida Kemper on 10/5/1837. His parents were Andrew Keplar and Mary Ann Bell of Westmoreland Co., PA. I do not know if they also moved to Hocking Co, OH. I have his date of death as 2/28/1879 at Daviess Co., MO.
Judy was born in 1816 and died 7/10/1880 in Daviess Co., MO. Her parents were Moses Kemper and Sarah Palmer.
In addition to the children that you listed they had a daughter Eliza. She was born in 1840 in Hocking Co., OH and died in 1915.
Eliza is my gg grandmother which would make David my ggg grandfather.
I have additional information if you are interested.