Hello,
I am wondering if your ancestor could be the uncle to my ancestor, Denis Sheahan. I've been trying to find his birth and immigration records. His parents are listed on his marriage certificate as John Sheahan and Mary Madigan.
I see your ancestor's brother was John Sheahan and they lived in Toledo Ohio. Family lore is John and Mary Sheahan came to US and settled in Ohio when Denis was a baby, circa 1848. I can't find any records to verify this. The first record I have of my ancestor is his civil war record, in which he joined a company out of Ohio. After the civil war he wound up in Rochester, NYand married Elizabeth Gilligan on June 10, 1869. Lived in Rochester until his death at 39 of a heart attack. He and Libby had 7 children: Sarah, John, Mary, Perry, Joseph James, Elizabeth, and Dennis.
The following generation all spell their name as Sheehan, but all the records for Denis are Sheahan. I have no record of siblings, etc.
Would love to see if you have any more details on your ancestor's brother John.
many thanks!