I am not related to nor do I know anything else about Mareen Duvall.An obituary in the Annapolis (MD) Capital newspaper on Nov. 4, 2010 mentions the deceased, Martin McKown Sr., as a descendant of Mareen Duvall of Middle Plantation, a 1650 immigrant to Anne Arundel Co. MD.
"... He (Martin McKown Sr.) was a member of the Maryland Society Sons of the American Revolution and a descendant of 13 Revolutionary War patriots, including Gilbert McKown, who served in the Berkeley Co. Virginia Militia. He was also a descendant of Mareen Duvall of Middle Plantation, a 1650 immigrant to Anne Arundel County. His father served as a Gunner's Mate on the USS Louisiana (BB 19) during World War I, and his great-grandfather, Charles B. McKown, served with the 3rd Ohio Volunteer Infantry during the Civil War and was processed through Camp Parole after his company had been captured in Alabama in 1863. ..."