Dennis O'Brien
b. circa 1847
- Father: Michael O'Brien b. circa 1810
- Mother: Margaret (?) b. circa 1820
- Dennis O'Brien was born circa 1847 in New York.
- Michael O'Brien and Margaret (?) appeared in the US federal census of 1 June 1860 in Buffalo, Erie County, New York. Other members of the household included Dennis O'Brien.
- Last Edited: 26 Jan 2006