So Manilow was a Pincus who became a Manilow and his father was a Pincus who became a Keliher. That’s true – except for the fact that his paternal grandmother, Anna “Annie” Sheehan, was born in New York to Irish immigrants, and her quarter of Manilow’s family tree is adorned with names like Sheehan, O’Donnell and Shields. Anna (Sheehan) Keliher had been a witness for her father’s naturalization, so this was definitely the right John Sheehan.