David Earnest Biggs is my grandfather and he married Johnnie Mae Sansbury. I have been attempting to research my Biggs family tree also, but both of my grandfathers were a Biggs. My mother's father was Olin D. Biggs and he married Ida Lee Johnson. it seems that a few of the Biggs brothers married sisters, etc. If you are still researching let me know and I might be able to assist you.
David Edison Biggs