THere's a William A Dahill in RI 1880 census married to Caroline ______. I think he may be a brother of my patriarch but can't learn any more about him. From census he would have been born abt 1806. I think he may have been born Ireland but married in CT abt 1838ish.

He had 2 daugs Josephine born abt 1838 in NY; Florie born abt 1841 RI and son William L Dahill born abt 1854 in RI. There were others in same household of 1880 RI census

PLEASE let me know if you can find any connection to him.
Hopefully yours, Diana