James Michael Roche - born around 1816

I am looking for siblings/family of James Michael Roche (b1816). Some say he is the son of Nelly Meade and James Roche. He was married on Feb 7, 1835 in Mary Hays in Buttevant. Their daughter, Ellen, was baptized there July 17, 1836. Then they emigrated to New York/Pennsylvania where he had two sons. Any information is appreciated. Thank you!