Prince Charles became King Charles III King of Great Britain, choosing the name Charles III. According to PA Media, it was his own choice.
In ancient times, it meant “free man”. In royal circles, he is perceived as a curse. Charles I was the only monarch to be executed for treason, and Charles II's reign was marked by plague and the Great Fire of London.
The current king went against tradition and did not choose the name George. He could have become George VII.
The coronation ceremony will traditionally take place at St. James's Palace in London. Liz Truss referred to King Charles III in her Downing Street speech, saying “Today the crown passes, as it has for over a thousand years, to our new monarch, His Majesty the King, Charles III.” The Westminster residence of the British royal family, Clarence House, confirmed the title.