I have a Margaret Cloonan, AUnt to Bridget Cloonan Mckenzie Bean. She married a Scahill/SKAHILL, and had children John Skahill and Margaret Skahill.
I am working from a family chart with few dates. They came from Galway, some came to central Ma , some to NYC, some to CA. It was a family pattern for cousins to marry and families of brothers marry families of sisters, the children were what was called double cousins.