on my grandmothers side of the family there are Rock relatives, I think mainly in Co. Cork. It has been passed down that the Rocks were originally Duroc surname, being descendants of Napoleons A.D.C Geraud Duroc. I have hit the proverbial brick wall and seem to be going round in circles. I would be interested if we are talking about the same Rocks. My grandmother married Archibald Allison and lived in Cork city.