Lee, I don't have Matthew on my family tree, but it's possible. Anna Agee b. 1810 in Manakin, Goochland Cty, Virginia m. Moses Phillips (b. 1808 in Sullivan Cty, Tennessee d.1851 in Osage Cty, Missouri) on Feb 26 1829 in Callaway Cty, Missouri.I only have son William Bethel Phillips b.1830 down as their son, but as is the case on most of my tree that I don't have siblings. Do you have any other children down for Moses and Anna? The only Matthews I have in this line are the father and grandpa of Anna Agee. This in itself makes it very likely that she would also have a son named Matthew to keep it going. I just don't have any records of him.
Who is your friend if you do not mind me asking? It sounds like we have some connections and the Agee's lead to the Blounts which brings up another mystery I am trying to solve... Could you give him or her my e-mail :)