b. ^ Ulster contains all of the Northern Ireland constituency (3 MEPs) as well as part of the Midlands–North-West constituency (4 MEPs); the counties of Cavan, Monaghan and Donegal contain 17.5% of the population of this constituency.
Ulster has no official function for local government purposes in either country. However, for the purposes of ISO 3166-2, Ulster is used to refer to the three counties of Cavan, Donegal and Monaghan only, which are given country sub-division code "IE-U". The name is also used by various organisations such as cultural and sporting bodies.
The name Ulster has several possible derivations: from the Norse name "Uladztir", which is an adaptation of Ulaidh and tir, the Irish for "land"; or similarly it may be derived from Ulaidh plus the Norse genitive s followed by the Irish tir. It has also been suggested to have derived from Uladh plus the Norse suffix ster (meaning place), which was common in the Shetland Islands and Norway.
The Irish name, Cúige Uladh, means the "province of the Ulaid" (Ulaidh in modern Irish), with the term cúige formerly referring to a fifth. The Ulaidh were a group of tribes who dwelt in the region.
Ulaidh has historically been anglicised as Ulagh or Ullagh and Latinised as Ulidia or Ultonia. The latter two have yielded the terms Ulidian and Ultonian. The Irish word for someone or something from Ulster is Ultach, and this can be found in the surnames MacNulty, MacAnulty, and Nulty, which all derive from Mac an Ultaigh, meaning "son of the Ulsterman". Words that have been used in English are Ullish and Ulsterman/Ulsterwoman.
Northern Ireland is often referred to as Ulster, despite including only six of Ulster's nine counties. This usage is most common amongst people in Northern Ireland who are unionist, although it is also used by the media throughout the United Kingdom. Most Irish nationalists object to the use of Ulster in this context.