First mention

 The first mention of Stonehenge – or ‘Stanenges’ – appears in the archaeological study of Henry of Huntingdon in about AD 1130, and that of Geoffrey of Monmouth six years later. In 1200 and 1250 it appeared as ‘Stanhenge’ and ‘Stonhenge’; as ‘Stonheng’ in 1297, and ‘the stone hengles’ in 1470. It became known as ‘Stonehenge’ in 1610, says English Heritageas