northern Irish
North Ireland is a geographical region not a person. There is also a country called Northern Ireland
Irish.
The sea that separates Ireland and Northern Ireland from Great Britain is called the Irish Sea. The area of sea immediately north of the Irish Sea is called the North Channel, and separates Northern Ireland from Scotland.
Irish.
The province which forms the entire geographic north of Ireland is called Ulster. It has nine counties. There is also what is called Northern Ireland which is most but not all of the province of Ulster. It contains six of the counties of Ulster. The most northerly point on the island of Ireland is in Ulster but is not actually in Northern Ireland. It is in county Donegal, one the three Ulster counties that are in the Republic of Ireland and not in Northern Ireland.
Just a Sligoman or a Sligowoman.
A New Yorker.
They are Irish. You could refer to them as Irish, or as an Irishman or Irishwoman.
St Brendan from Ireland of course.
There is no place in Ireland called Lisban.There is a village called Lisbane, Ards, near County Down, Eire, on the north-east corner of Ireland, near Belfast.See 'Related Links' below for map and more information.
The Mournes and Sperrins also Antrim Plateau
I'd say it's in the North-East of Ireland.