Britannia was the Roman and Greek term for the geographical region of Great Britain which was inhabited by the Britons and is the name given to the female personification of the island. It is a term still used to refer to the island today. The name is Latin, and derives from the Greek form Prettanike or Brettaniai, which originally designated a collection of islands with individual names, including Albion or Great Britain; however, by the 1st century BC, Britannia came to be used for Great Britain specifically. In AD 43 the Roman Empire began its conquest of the island, establishing a province they called Britannia, which came to encompass the parts of the island south of Caledonia (roughly Scotland). The native Celtic inhabitants of the province are known as the Britons. In the 2nd century, Roman Britannia came to be personified as a goddess, armed with a trident and shield and wearing a Corinthian helmet.