No it can not.
People in Northern Ireland can have British or Irish citizenship.
Northern Irish
The Nationality of Man United's Norman Whiteside is Northern Ireland.
The Nationality of Man United's Mal Donaghy is Northern Ireland.
Northern Irish citizens are entitled to British nationality, Irish nationality, or both (dual British-Irish nationality).Children born in Northern Ireland are British Citizens by default at the time of their birth, per United Kingdom nationality law. However, the child can almost immediately be registered as an Irish Citizen instead of (or as well as) a British Citizen, usually if born into an Irish family.
McFarland is a Northern Irish name.
Boland: Irish, particularly northern Irish.
Northern Irish: variant of McConaghy.
Nadine's form Northern Ireland.
Thompson is an English name. It means son of Thomas. Most common in northern England and northern Ireland.
My mother is an Elmore and her family was originally from northern Ireland.
It is Irish from the northern part of Ireland and is possibly derived from a Viking name.