What is Prince Charles mothers full name?

Prince Charles's mother is Elizabeth II (Elizabeth Alexandra Mary, born 21 April 1926 and is the constitutional monarch of 16 sovereign states known as the Commonwealth realms: the United Kingdom, 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. As Head of the Commonwealth, she is the figurehead of the 54-member Commonwealth of Nations; as the British monarch, she is the Supreme Governor of the Church of England.

She was baptised into the Anglican faith as Elizabeth Alexandra Mary Windsor by the Anglican Archbishop of York, Cosmo Lang, in the private chapel of Buckingham Palace on 29 May 1926.