Elizabeth II (Elizabeth Alexandra Mary; born 21 April 1926) is the queen regnant of 16 independent states and their overseas territories and dependencies. Though she holds each crown and title separately and equally, and carries out duties in and on behalf of the other states of which she is monarch, Elizabeth is resident in and most directly involved with the United Kingdom, her oldest realm; part of her lineage traces through the royal houses of England, Wessex, and Scotland for over 1500 years. She ascended the thrones of seven countries in February 1952, on the death of her father King George VI. In addition to the United Kingdom, Elizabeth II is also Queen of Canada, Australia, New Zealand, Jamaica, Barbados, the Bahamas, Grenada, Papua New Guinea, the Solomon Islands, Tuvalu, Saint Lucia, Saint Vincent and the Grenadines, Belize, Antigua and Barbuda, and Saint Kitts and Nevis, in each of which she is represented by a Governor-General. The 16 countries of which she is Queen are known informally and unofficially as Commonwealth realms, and their combined population, including dependencies, is over 129 million. In theory her powers are vast; however, in practice (and in accordance with convention), she rarely intervenes in political matters.