The American Clan Gregor Society is a genealogically based Society meaning members must meet certain requirements in their family history. Any person is eligible for lineal membership in the ACGS, Inc if they: are 18 years of age or over and bear the name MacGregor or variations thereof, or the name of one of the numerous Septs, who can trace his/her ancestry to Scotland or the Americas prior to 1870; or are 18 years of age or over and is a descendant of an ancestor born prior to 1812 bearing the surname of Magruder or MacGehee.