Looking for information on John Ahern that came to America from Ireland around 1850, believed to enter the US at Boston?First lived in Salmon Falls, NH and married there to Catherine Fegan. Two sons born in NH, Jeremiah(1855) and John (1857). Then moved to Greenvale, Minnesota and stayed. Had several more children. Died in 1869 and is buried in the area of Northfield, MN. Where did he come from in Ireland? Who did he travel to America with? Names of his parents? or siblings? This man in my great grandfather. Thanks for any help.