This Asa you speak of was listed in the 1800 Anson County, North Carolina census. I believe he was born perhaps Edgecombe County, NC. He is listed next door to son, Kader/Cader Gewin/Guin. Other sons are Jeremiah, Asa, Jr. and Levi Gewin/Guin. He is also confused with a Asa Gewin born in 1735.