Looking for Michael O Connor of Manchester USA

Looking for any information, mainly the parents of Michael O'Connor, born about 1840 (possibly Ireland) maried Johanna Cronin 15 April 1858 in Saint Anne Church Manchester NH.USA, Johanna was born about 1840. Children were Margaret, Martin, Andrew and Mary.
Margaret(b 23 jan 1859) and Martin(b 22 sep 1860) born in USA, Andrew (b 1865) and Mary (b 1867) born in NSW Australia