John Costigan was born to James Costigan and Elizabeth Dougherty (Doherty) in Moneygall, Offaly, Ireland in 1838. Had a younger brother William . After James' death in mid 1840s Eliza m. Lawrence Grant, Irish immigrant farmer, and they moved to Hinsdale by 1850. John Costigan later became a successful merchant in Salamanca. His brother William was a railroader living in Freedam, Allegany County. John died in 1910, William in 1906. Seeking Costigan information. Thanks, Tom O'Hare, Buffalo, N.Y.