The song brings a tear to the eye of anyone who can claim Irish heritage (like me). It is also a song which speaks for all the mothers who have sent their children off to war although it is said that it also referred to farewelling the mass emigration of the Irish to other countries, never to return. The boy and background were Googled. The song is known as "Danny Boy" and also "Londonderry Air". The lyrics were written by Frederic Weatherly. The tune is from the traditional song "Londonderry Air".