 The village of Llanfairpwllgwyngyll is named after St Mary's Church.The long form of this name, Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch, was first adopted in the 19th century as a promotional device.In English, the first and older element of the name means "The Church of St Mary at Pwllgwyngyll [the white hazel pool]".