I saw this with some interest. John O'Shaughnessy of Stillwater is my great grandfather on my mother's side. O"S married O"S. He did learn the bootmaker's trade in Milford where he came as the youngest of a family. His mother had been married earlier to an O'Brien and he had half sibblings with that name. He came to Stillwater in 1861. They had 13 children, but no William I aware of, though I will check that.