'the island of the whortleberries'

cf. Árd na Caoraí Sraothna/Sréana - Blaeberry hill' i mbf Srath Laoill Thuaidh

"Caor sraothain (?) is the local word for 'blaeberry' or 'whortleberry'. The word fraochán which is found in N. Donegal is not used here." O'Neill, The Placenames of Glencolumbkille Parish, Co. Donegal (PhD thesis), QUB, 1973 p. 99. cf. Árd na gCaoraí Sréana, O'Kane, "Placenames of Inniskeel and Kilteevoge", ZCP, 31 (1970), p.117.