Seán Ó Riada (1 August 1931 – 3 October 1971), was a composer and perhaps the single most influential figure in the revival of Irish traditional music during the 1960s. He became a household figure in Ireland through his participation in Ceoltóirí Chualann, compositions, writings and broadcasts on the topic.

http://en.wikipedia.org/wiki/Se%C3%A1n...