finding Hannah Brennan, Greg's GGGM

Hannah Brennan immigrated from Ireland and married Edward Brennan, and they were the parents of John J. Brennan, born 1867 in PA. 

Could this be her? I don't think so.  She was supposedly born in 1826.

Hannah Breanan Ireland Births and Baptisms, 1620-1881	christening: 16 Aug 1848 ROMAN CATHOLIC,​KILLARNEY,​KERRY,​IRELAND residence: Kerr,​ Ireland	parents: Brien Breanan,​ Mgt. Moran