Garrahan/Garahan in PA

Have researched Garahan family in Pittsburgh PA, to early 1800's

Now have James Sylvester Garahan, wife Bridget McCullough, and their children as well as parents of James, Bernard Garahan and his wife Mary G. in mid-1800's as well as their children.

Now trying to find Irish county from which Bernard Garahan emmigrated between 1811 and 1848 as well as maiden name and Irish place of birth of his wife Mary G. (may be Grace)who was born 1817.

If anyone else is searching this family who have been found in Mifflin Twp., Knoxville, N. Versaille and possibly St. Clair Twp, (all in Pittsburgh area) please contact me.Carol S.