I'm trying to locate a Neilon (or any variation) that might be missing a sibling! My immigrant ancestor was James Neilon who came from County Roscommon, Ireland, during the 1840's to Boston, then settled in Collin County, Texas. He seems to have hooked up with his brother-in-law, James Gallagher.
James Neilon has no siblings or other family members in Texas other than his wife and children. Two sons and a daughter were born in Ireland, Edward and Patrick. Two were born in Boston, James and Theresa. Five other children were born in Texas.