Derry or Londonderry is the second-biggest city in Northern Ireland and the fourth-biggest city on the island of Ireland. The name Derry is an anglicisation of the Irish name Daire or Doire meaning "oak grove". In 1613, the city was granted a Royal Charter by King James I and the "London" prefix was added, changing the name of the city to Londonderry. While the city is more usually known as Derry, Londonderry is also used and remains the legal name.