The information that I have on this mystery line is as follows:
John Lewis (1669 - 1725)& Elizabeth Warner (1672 - 1720) Children: Mildred Lewis John Lewis Charles Lewis Anne Lewis Robert Lewis Catherine Lewis Elizabeth Lewis Jobert Lewis Isabella Lewis Mary Lewis
Mildred Warner (Elizabeth Warner sister) married Lawrence Washington Children Mildred Washington John Washington Augustine Washington
Mildred Lewis (1691-1747) &John Howell (abt 1698 - 1734) married Abt. 1720 Mildred Lewis (1691-1747) & John Brown ( ? - 1726) married 1724 Mildred Lewis (1691-1747) & Henry Willis (abt 1696 - 1740) married Oct 30, 1726
After Mildred Lewis died in 1747, Henry Willis married Mildred Washington, daughter of Mildred Warner & Lawrence Washington.
I did not feel like I have solid proof that Mildred Lewis is in fact the daughter of John Lewis & Elizabeth Warner, but it does fit in with other known facts. We do know that Mildred Washington married Henry Willis. The Willis family bible does name Henry Willis wives as: Ann Smith, Mildred Brown and Mildred Gregory. Mildred Gregory is Mildred Washington, daughter of Mildred Warner & Lawrence Washington.
The writings of Mildred Gregory Washington indicate that Mildred Brown was her cousin. From Geroge Washington, A Biography by Douglas Southhall Freename, Volume one. Published by Charles Scribner's Sons, New York. Copyright 1948.
Page:61 Mildred [Washington] stated "the death of her relation was not the sole cause of her ?? though she loved her dearly as they were cousins and bore the same name, but that she knew old Henry Willis would be down and she did not know what to do with him".
The two Mildred would have been cousins through the Warner Line.
The children of Henry Willis and Mildred Washington are: Isabel Willis b. Jun 10, 1733 Lewis Willis b. Nov 11, 1734