Hello Deirdre. My ancestors came over from Ireland to NYC in 1849 (John & 1/2 the kids; February 23, 1849) & 1850 )Margaret & the other 1/2; February 22, 1850). They show up in the 1850 Federal Census, living in Astoria/Long Island City. The family remained in this general vicinity until WWII when the 2nd Irish diaspora occurred. Do you have any information about those famine Delahunty's?