Britannia has been used in several different senses, but is best known as a national personification of the United Kingdom. The name is a Latinisation of the native Brittonic word for the island, Pretanī, which also produced the Greek form Prettanike or Brettaniai, which originally, in the fourth to the first centuries BC, designated a collection of islands with individual names, including Albion or Britain. In Modern Welsh the name remains Prydain. By the 1st century BC, Britannia came to be used for Great Britain specifically. After the Roman conquest in 43 AD, Britannia meant Roman Britain, a province covering the island south of Caledonia. When Roman Britain was divided into four provinces in 197 AD, two were called Britannia Superior and Britannia Inferior. Britannia is the name given to the female personification of the island, and it is a term still used to refer to the whole island.