Regardless of anything you find in Wikitree, no Cherokee person lived in Maryland or had any connection there in the 18th century.
The James Adair who wrote about the Cherokee was NOT related to the Cherokee Adairs. James Adair the author had a Chickasaw family. He mentions almost no one by name in his section on the Cherokee, no mention of anyone named 'Lightfoot' or ' Gahoga'.
The Cherokee villages of the 18th century were centered on the Tennessee River, not in North Carolina. "Qualla Boundary" refers to a specific and very small area in North Carolina.
Vann families in Texas have nothing to do with Cherokee in the middle of the 18th century.
Adair's book does not name the Cherokee clans, and he mentions them only in passing. The seven clans of the Cherokee are: A ni gi lo hi (Long Hair), a ni sa ho ni (Blue), A ni wa ya (Wolf), a ni ga te ge wi (Wild Potato), an I a wi (Deer), a ni tsi s qua (Bird), and a ni wo di (Paint). Nancy/Gahoga Foster Adair and Dorcas Benge Duncan were members of the Deer Clan.
The 'Old Settler' Roll was created in 1851. The only rolls created between 1817 and 1819 are the Emigration Rolls; Nancy/Gahoga Adair died about 1790. Dorcas was alive as late as 1823. She took a reservation of land under the Treaty of 1817 which was taken from her by the State of Georgia in 1823. Her son Edmond took a reservation, also taken by the State of Georgia. Her son Charles Gordon Duncan and his family emigrated to Indian Territory in 1834. Dorcas was not with them. There is no one named 'Lightfoot" on the Emigration Rolls, the census of 1835, or any of the four 1851 rolls - the 'Old Settler', the Drennan, the Siler, or the Chapman.
There is no one named Lott found on Cherokee rolls. These people have been erroneously connected to the family of Ga ho ga.
The following journal article, available on JSTOR, clearly identifies Mary Clack and her connection to John Lightfoot:
Citation: Clack Family
The William and Mary Quarterly
Vol. 19, No. 2 (Oct., 1910), pp. 109-111
Published by: Omohundro Institute of Early American History and Culture
DOI: 10.2307/1921264
Stable URL: http://www.jstor.org/stable/1921264
Page Count: 3
Excerpt:
“Issue of James and Mary Clack (1) Sterling Clack, clerk of Brunswick County, married Anne Eldridge, and had issue: James and Eldridge Clack, probably others. After his death in 1757, his widow, Anne, renounced the provisions of his will. (Brunswick County records.) (2) Mary, married I. John Lightfoot. No issue; II. Robert Ruffin, (marriage bond Sept. 6, 1751), …”