The Story of the Glenarm Name

The name Glenarm comes from the Irish Gleann Arma, traditionally understood as “Glen of the Army.” The name refers to the great valley through which the Glenarm River flows before reaching the sea. Glenarm is the southernmost of the Nine Glens of Antrim, and its sheltered valley has made it an important natural route between the interior and the coast for centuries.

Glenarm has an unusually long history for such a small village. A castle existed here by the thirteenth century, when the area was associated with the Bisset family. The Bissets, originally from Scotland, established themselves among the Glens of Antrim, and Glenarm became an important center of their power.

The story of Glenarm changed dramatically in the late Middle Ages when the MacDonnells arrived from Scotland and gradually established themselves as one of the most powerful families in the region. John Mór MacDonnell came to Glenarm in the late fourteenth century and married Marjory Bisset, heiress to the Glens. From this union grew the MacDonnell dynasty that would shape the history of the Antrim coast for centuries.

Among the family's most famous figures was Sorley Boy MacDonnell, the formidable sixteenth-century Gaelic chieftain whose power extended across much of north Antrim. The MacDonnells eventually made Glenarm one of their principal seats, and in 1636, Randal MacDonnell, 1st Earl of Antrim, built a new castle on the opposite side of the river.

That castle was caught up in the violence of the seventeenth century. In 1642, a Scottish Covenanter army under General Robert Munro burned Glenarm Castle during the conflict surrounding the 1641 rebellion. The ruined house remained largely abandoned for more than a century before Alexander MacDonnell, 5th Earl of Antrim, commissioned its rebuilding in the 1750s. The magnificent house that emerged became the center of the Antrim estate.

Glenarm itself developed alongside the castle and estate. Its harbor connected the village with the sea, while the surrounding valley supported farming, woodland and estate activities. By the nineteenth century, Glenarm was described as a small but thriving coastal settlement of more than 800 inhabitants.

The village still bears the marks of its long connection with the MacDonnells. Glenarm Castle remains the ancestral home of the Earls of Antrim, and the estate's walled gardens and historic buildings continue to form an important part of the village's identity.

Today, Glenarm is a quiet village surrounded by some of the most beautiful scenery in County Antrim. But its peaceful appearance hides a remarkable history of Gaelic chiefs, Scottish settlers, medieval castles, clan rivalries, war and one of Ireland's great aristocratic families.

Glenarm is more than a beautiful village in a glen—it is one of the places where the story of the MacDonnells and the Glens of Antrim can still be felt.