I have a great who is running me crazy! His name was Robert D (or possibly O) Mackey. According to census records, he was born 1811 to 1814 in OH, his parents were both born in PA and Robert was a brickmason/stonemason. Robert ended up in Caldwell County, KY and married Adelisa (Adelissa) M Dunn. I'm not sure who her parents were either but I figure she's part of the large Dunn clan living there at the time. The 1850 Princeton, Caldwell County, KY Census shows Robert and Adelissa and their children: Johnson Arabel, daughter, who was 3 and Martha, daughter, who was 5.
In the 1860 Princeton, Caldwell County, KY census Robert is listed as R Mackey, born in OH, his age is 47, he's listed as a stone mason, and in the household are: Martha, age 14, Johnson, age 12, Lizetta, age 7, Mary, age 5, Pernecia, age 3 (my line), and George, age 8 months. All the kids are listed as born in KY. Adelissa isn't in this census or following ones, at least not in Robert's household. I presume she died and the 1870 census shows Robert as widowed.
The 1870 Princeton, Caldwell County, KY census shows Robert in the household of Tinsley Kilgore, who I think is the husband of his daughter, Johnson.
I'm pretty sure Robert's son George moved to the Houston, TX area but haven't found descendants yet. Pernecia married a Satterfield and had a son named John then later married James Rufus Dunn. Pernecia and James and kids moved to New Madrid area of Missouri between 1905-1907.
Anyway, I haven't a clue where in OH Robert came from or where in PA his parents came from. If any of this rings a bell with you, please contact me!