The "Londonderry Air" is an Irish air (folk tune) that originated in County Londonderry, first recorded in the nineteenth century. It is popular among the North American Irish diaspora and is well known throughout the world. The tune is played as the victory sporting anthem of Northern Ireland at the Commonwealth Games. The song "Danny Boy" written by English lawyer Fred Weatherly uses the tune, with a set of lyrics written in the early 20th century.
