Going to the American dictionary at dictionary dot com ...
It's the safe way to explain this thing.
redneck
1. an uneducated white farm laborer, especially from the South.
2. a bigot or reactionary, especially from the rural working class.
rube
an unsophisticated person from a rural area; hick.
hick
an unsophisticated, boorish, and provincial person; rube.
For whatever it's worth, I have a similar association with
Amos.
Asa does sound rural South to me too, but antiquated - I don't think I'd think of it if I met a child
Asa.
- mirfak