Hi - I apologize for not answering your query until so long after it appeared. But I can make no connections to Boyle County by any of my ancestors. They were all from County Donegal, came over during the famine and mostly settled in southwestern Wisconsin. Many Irish were drawn to Shullsburg Wisconsin at that time by a boom in mining. Practically all of them remained in Wisconsin including other relatives not named Boyle, I.E. Gallagher.
I am very sorry for the slow response and hope you can find answers eventually. It is amazing what many turn up when it is least expected. Sincerely Shirley Ann Boyole