Clannad are a musical group from Gweedore, in County Donegal, which is in the north-west of Ireland. They are very famous for their haunting sound that has been used in many Hollywood movies. They have sold over 20 million albums all over the world and won a Grammy award in 1999. They are brothers and sisters Máire, Ciarán, and Pól Brennan and their uncles Noel and Pádraig Duggan. Their younger sister Enya was once part of the group.