What is "arranmore"

Árainn Mhór ( English name: Arranmore) is an island off the west coast of County Donegal, Ireland. Arranmore is the largest inhabited island of County Donegal, with a population of 514 in 2011, down from 528 in 2006, 543 in 2002, and over 600 in 1996. The island is part of the Donegal Gaeltacht.

It is also known in English as Aran Island (not to be confused with the Aran Islands off Galway Bay or the Scottish Isle of Arran). In Irish the island was traditionally called Árainn; the adjective mór (large) was added fairly recently. It was also sometimes called in Irish Árainn Uí Dhomhnaill, meaning the 'Aran of the O'Donnells'.