You folks are good!

My only hesitance about substituting "Shanballymore" for "Strandballymore" is that neither the Shanballymore in Galway nor the Shanballymore in Cork is located on a body of water. The one in Cork is at least within some miles of a river, but it's still not a town you'd expect ships to sail in.

Can't find a modern reference to Strandballymore. Towns simply called Ballymore (one in Donegal, one in Westmeath and one in Wexford) aren't on the ocean, either.