Son of Patrick and Mary Ann Dean.
Eugene immigrated to America in 1850. He worked for the Husdson River Railroad before moving to Hastings in 1855.
He married Ellen M. O'Connor. They had 2 children: Mary and James. Ellen died in 1865.
Eugene married Elizabeth Mary Quirk in 1866. Their children were: John, Francis, Eugene and Josephine Johanna.
Eugene was elected Justice of the Peace in 1876.