I am a descendant of David McKee, George Y.'s oldest brother (Nov. 10, 1798 - Feb. 29, 1872).I currently live in Butler, PA.
I have a copy of A History of the Descendnts of David McKee of Anahilt. County Down by James Y. McKee.It lists George Y.'s descendants as Charles Horace McKee (b. Apr. 21, 1854) and Louisa Clara McKee Morrison (b. June 26, 1857).Louisa had a daughter Agnes Elizabeth (b. July 22, 1885).