I don't have any information on the Culhanes who stayed behind in Ireland, although I intend to go across to Glin n Kilmartin and get some.
My ancestor Daniel left Ireland in 1830-40 and I am pretty sure he had a family in Ireland.I believe his first wife died before he came to England, but I don't know if there were any descendants.It is, of course, highly likely.
As you may know, Daniel is a common first name in that part of Ireland, being an Anglicization of the Gealic name Donal.
My elder sister was called Moira - I believe it was a common Culhane family name.It was certainly not after any particular relation. Do you know why you were named Moira.