Question: What is the Irish name for the castle that was occupied by the MacDonnells?

Context paragraphs:
Moriarty (name): The name Moriarty is an Anglicized version of the Irish name Ó Muircheartaigh which originated in County Kerry in Ireland. " Ó Muircheartaigh" can be translated to mean 'navigator' or 'sea worthy', as the Irish word "muir" means sea (cognate to the Latin word "mare" for 'sea') and "cheart" means correct.  Several people have the Irish name Moriarty, mostly as a surname.

Dunaneeny Castle: Dunaneeny Castle (or "Dunineny Castle", Irish "Dún an Aonaigh") is a ruined castle near Ballycastle, Antrim, Northern Ireland.  The castle was home to the chiefs of Clan MacDonald of Dunnyveg and later the MacDonnells of Antrim.

Glenarm: Dating back to Norman times, the village is the family seat of the MacDonnells, who once occupied Dunluce Castle on the north coast.  The village is now a Conservation Area, and its main street (Altmore Street) leads directly to Glenarm Forest, from which can be seen Glenarm Castle, on the far bank of the little river which runs through the village to the sea.  The imposing entrance to Glenarm Castle, the Barbican Gate, is at the heart of the village.  The Castle dates from 1750, with early 19th century alterations.  Glenarm claims to be the oldest town in Ulster, having been granted a charter in the 12th century.  The Barbican Gate to Glenarm Castle was restored by the Irish Landmark Trust, a conservation charity that saves buildings that are at risk of being lost.

Clan MacAuley of the Glens: Clan MacAuley of the Glens was a small Irish clan that descend from south-western Scotland, who originally come over to Ulster to serve as galloglass mercenaries.  They held lands in the Glens of Antrim in modern County Antrim and the chief was at one time known as Lord of the Glens.  In 1559, the clan participated in the Battle of Aura, in which the McQuillans were defeated by the MacDonnells.  The MacAuleys and MacPhoils arrived midway through the battle, and had planned on siding with the McQuillans and O'Neills, but the chief of the clan was persuaded by Sorley Boy MacDonnell to join forces with the MacDonnells.

Keenan: Keenan (Cianán) is a male Irish name which means "ancient, distant".  "Keenan" is an Anglicisation of the Irish name "Cianán" which is a diminutive of "Cian".  The Ó Cianáin clan (Keenan) were the traditional historians to the McGuire clan.  Keenan can also be used to describe someone or something perceived to be good, pleasant, happy, etc in some dialects.  Ex.  "That dinner was Keenan."

Slíghe Chualann: Slíghe Chualann was an ancient roadway which stretched from the residence of the High King of Ireland at Tara to the lands of Cuala.  Cuala is the area that is seen today as from South County Dublin to North County Wicklow including Bray.  The old Irish name for Bray was "Brí Chualann" rather than its current Irish name of "Bré", thus showing its ancient association to the Slíghe Chualann.

Aghavrin: It is referred to as 'Aghrin' in the Down Survey Maps (1656-8), Aghawrinmore & Aghawrinbeg are listed as sub-denominations, and the terrier lists the proprietor as Lord Muskry (Muskerry).  The Ordnance Survey name book ("c".  1840) gives an alternate Irish name of "Ath a buirinn" to the townland, also lists Ahavrinbeg and Ahavrinmore as sub-denominations, and describes the townland as the property of John Bowin (Bowen), Esq. of Oak Grove, and John Bowin Gumbleton, Esq.  Its condition was said to be of mixed quality, principally cultivated, but containing some boggy land, rocks and furze.  The townland was said to have several waterfalls to the south-west, and places included Bowing's (Bowen's) Pond, Good's Pond, Poulahourane (Waterfall), Poulanassig (Waterfall), Ahavrinmore, Ahavrieg, Ahavringrove, Ahavrin Castle (Crooke's Castle), Carrigacubbeen and Clashagorrave River.  O'Donoghue (1986) holds Achadh Bhroin to mean Bron's field, and that Bron was father of Maolmuadh, king of Munster in 959, and grandfather of Cian.  O'Murchú (1991) holds upon local authority that "Achadh Bhroin" may refer to Byrne's or Burns' field.  The Placenames Database of Ireland gives an alternate Irish name of "Achadh Bhrain" to the townland.

Muire: Muire (English: Mary ) is an Irish name given exclusively to the Blessed Virgin Mary.  The Irish name "Máire" is typically used for the name "Mary".  "Muire" is used exclusively for the Virgin Mary.

Dunluce Castle: Dunluce Castle (from Irish: "Dún Libhse" ) is a now-ruined medieval castle in Northern Ireland.  It is located on the edge of a basalt outcropping in County Antrim (between Portballintrae and Portrush), and is accessible via a bridge connecting it to the mainland.  The castle is surrounded by extremely steep drops on either side, which may have been an important factor to the early Christians and Vikings who were drawn to this place where an early Irish fort once stood.

Don (given name): Don is a masculine given name in the Irish language and a short form of another masculine given name in the English language.  The Irish name is derived from the Irish "donn"; the name can either mean "brown", or "chief", "noble".  The Irish name is a variant spelling of "Donn".  The English name is unrelated to the Irish name; this name is a short form of the given name "Donald".  Pet forms of this English name include: "Donnie" and "Donny".  It can also be a surname, also derived from "brown".  It is a common name in the English language.

Supporting paragraphs: Glenarm Dunluce Castle
Answer: Dún Libhse