Looking for Others Researching David Graves of Macon CO Missouri

I have been researching the Graves family for many years. Richard Hardin lived in Lancaster Missouri 1847-- 1900(?). His parents were David Graves and Phoebe Mahurin from Shelby Co. Kentucky. Who were his brothers and Sisters. Supposedly his father was Richard(Dicky) Graves and Agnes Holloway of North Carolina. Who were there Parents. I'm interested in the extended family of any or each of the mentioned persons.