Have you tried the neighboring Daviess Co? My aunt was married to a Worthington, until his passing. I remember going to their house as a child. They lived on the edge of Owensboro, Daviess Co., on a small farm. They lived on Worthington Road. The road is still there and I believe the house still exists. I remember there was a graveyard there, as that is where my aunt's husband was buried. It was an old cemetery from what I remember, I could be wrong though.