I grew up in Aberdeen, but the McKeithen branch of my family (my father's mother was Catherine McKeithen, buried in Bethesda Cemetery in Aberdeen) was based in Carthage, county seat of Moore Co. Miss Annie and Miss Frances McKeithen were long-time school teachers there. (They died a few years ago and are also buried at Bethesda.) They always told me that the McKeithens were a sept of the Clan MacPherson, but I have not been able to officially confirmed that. The other obivious clan connection could be the Keith Clan. Both MacPhersons and Keiths list MacKeith as an allied family. Interestingly, there was a McKeithan family (-an instead of -en) in Moore County that was not closely related to me. But I guess at some point back in history they are connected. A good source of info on Moore County McKeithens might be Bill Blue, a cousin of mine who is an attorney in Chapel Hill.