a schooner was launched fromn Yarmouth in 18334 called the Nora Creina, a steam locomotive ran in Dublin called the Nora Creina in 1844, there is a Nora Creina Bay in Australia, and steam packets named Nora Creina ran there, it could be like Kathleen Mavourneen, a name for Ireland, but more likely the jig tune 'Nora Creina', named for some Wise Nora somewhere just became so popular, and many songs were put to this air, and they became popular. We may never know who this Nora Creina was. There are novels of late 19th c. called Nora Creina, and boats called Nora Creina appear in other books of later 19th c. Once you have the tune it sticks in your head, I must say, makes it easy to sing any of the lyrics above.