In addition to James, Patrick, Ann, Michael and Catherine, another possible child of James and Mary Lennon was a Mary Lennon who married a Mr. Garvey. A submission to the WorldConnect Project claims his first name was John, but a message at the Garvey Gen Forum says it was William Garvey.http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?op=GET&...http://genforum.genealogy.com/garvey/messages/429.html
On the page next to James and Mary Lennon on the 1860 census at Freedom, Outagamie Co WI, is the household of William (b ca 1825) and Mary Garvey (b ca 1832). They were both listed as born in Ireland. Names and approximate birth years of children, all born in Wisconsin, from 1860-80 censuses:
Bridget 1852, John 1853, Mary A. 1855, Ann 1858, Catherine 1859, James 1863, Marcella 1866, Ellen 1868.