Can someone help find ancestors of Michael Barnes born in 1812 in Meath, Ireland?

Question

Birth around 1812 in Grange, Meath, Ireland

Death march 1879 in Java, New York

Married Nancy Ann McCahill about 1840

   Her birth was around 1812 in Cavan, Ireland

   Death September 1881 in Java, New York

Answer 1

A couple of Ancestry.com family trees say his wife’s name was Nancy Ann McCahill.  There are no sources, but the name possibility might help with the search.