Unknown's name may have been Dominic as baptismal records have been located online for Charles, Bridget, John and Thomas whose parents were Dominic Morahan and Mary Killelea - I believe John, my husband's ancestor, had siblings named Charles Bridget and Thomas. Baptismal records have also been found for two other children of Dominic and his wife, Mary (Margaret and Mary) I have included them below.
Morahan is an unusual surname in Ireland but is not uncommon in Connaught. It comes from the Irish 'Ó Murcháin' of which there were two septs, one in Offaly and one in Leitrim. The name is sometimes spelled 'Moraghan', or shortened to 'Moran'.