Montagne Pourpre
Irish academic Paul Tempan wrote in his 2010 "Irish Hill and Mountain Names", that Purple Mountain is "almost certainly a name coined in English". In his "Topographical Dictionary of Ireland" (1837), Samuel Lewis wrote that Purple Mountain is "so called from the colour of the shivered slate on its surface". Tempan notes that the "Irish version looks like a back–translation from the English by OSI".