Niall Ó Dónaill (27 August 1908 – 10 February 1995) was an Irish language lexicographer from Ailt an Eidhinn, Loughanure, County Donegal. He was the oldest of the six children of Tarlach Ó Dónaill and Éilis Nic Ruairí from Grial, Loughanure. They had a little land and a few cows. His father would spend June to November working in Scotland and died when Niall Ó Dónaill was 13 years old. Ó Dónaill himself would spend summers working in the tunnels in Scotland. During his time in university he would spend his summers teaching at Coláiste Bhríde, Rann na Feirste. Ó Dónaill is most famous for his work as editor of the 1977 Irish-English dictionary Foclóir Gaeilge-Béarla, which is still widely used today. Ó Dónaill received his education at Scoil Loch an Iúir in Loughanure before gaining a scholarship to St Eunan's College in Letterkenny. Another scholarship took him to University College Dublin to study Irish, English and History. In June 1982 he was awarded a D.Litt. by Trinity College Dublin. Ó Dónaill wrote the book Bruigheann Féile which is based on stories of pastimes in the Gaeltacht town Loughanure and its surrounding area. Ó Dónaill's book Na Glúnta Rosannacha was first published in 1952. He was awarded Gradam an Oireachtais at Oireachtas na Gaeilge in 1980. Ó Dónaill died in 1995.