Британния – аллегорическая фигура, символизирующуя Великобританию. Имя происходит от латинского наименования Британских островов.
a female figure representing Britain, formerly shown on some coins. Britannia is usually shown sitting down, wearing a helmet, and holding a trident (=an ancient weapon with three points, which looks like a large fork). Next to her feet she has a shield with the design of the British flag on it. There is a popular national song called Rule Britannia.
From online Longman Dictionary of Contemporary English Advanced Learners Dictionary
a woman who is a symbol of Britain. She wears a helmet and carries a shield and trident (=a weapon like a large fork).
From online Macmillan Dictionary
Britannia is an ancient term for Great Britain, and also a female personification of the island. 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.
The Latin name Britannia long survived the Roman withdrawal from Britain in the 5th century, and yielded the name for the island in most European and various other languages, including the English Britain and the modern Welsh Prydain. After centuries of declining use, the Latin form was revived during the English Renaissance as a rhetorical evocation of a British national identity. Especially following the Acts of Union in 1707, which joined the Kingdoms of England and Scotland, the personification of the martial Britannia was used as an emblem of British imperial power and unity. She has appeared consistently on British coinage ever since.
Resource Materials, Worksheet 1B “Being British”, p. 192.
Anglia – позднее латинское наименования Англии (England). Сохранилось в названии региона East Anglia.