Website: http://www.ancestry.com/wiki/index.php?title=Colonial_Order_of_the_Acorn
The Colonial Order of the Acorn is an invitation-only hereditary organization for those that are a descendant, in the male line, of a forefather resident of the American Colonies prior to July 4th, 1776.
Source(s): http://www.ancestry.com/wiki/index.php?title=Colonial_Order_of_the_Acorn