I have found some info in my "cronin" search that may be related to your quest. It is a family "group sheet" on rootsweb.com of Jeremiah Cronin(b.1797)/Mary McCarthy(b.1805). One of their children was named Cornelius(b.1831)and died near Lake Geneva, Wi(date not give) and married someone named Mary (around 1846). My mother's maiden name is Cronin. Her father was John Cronin and his father was James Cronin (1865-1921)son of Jeremiah Cronin and Margaret Sullivan (both born in Ireland)who I think may have been the son on this Jeremiah Cronin I mentioned above.