Good hunting with the Keating family.
William Nathaniel Keating/e is my GGGrandfather born abt 1855 in Clonmel.
His father was also William born early 1800's no doubt.
Was your family Church of Ireland or Catholic.
Have you had a look at the Family search site and the Pilot Search??
There are a lot of Keatings on there, birth, marriage & death. Might help you.
Good hunting and I will keep you in mind also.