Ambrose Powell

I am looking for info on my gggggg grandfather Ambrose Powell
b.1754 (N. Carolina?)
d.1827 (sept?)
m.?Margaret? (may be Holt)

Trying to find out his wife's true name and where they were buried. To my knowlege Ambrose may be buried in Muary Co. Tenn.
Any info is appreciated Thank you! - Alex