By what informal name were both Edward VII and George VI known?

Edward VII (9 November 1841 – 6 May 1910) was King of the United Kingdom and the British Dominions and Emperor of India from 22 January 1901 until his death in 1910.

Edward was born in Buckingham Palace. He was the eldest son and second child of Queen Victoria and her husband Prince Albert of Saxe-Coburg and Gotha. He was christened Albert Edward at St George's Chapel, Windsor Castle, on 25 January 1842. He was named Albert after his father and Edward after his maternal grandfather Prince Edward, Duke of Kent and Strathearn. He was known as Bertie to the royal family throughout his life.

George VI (Albert Frederick Arthur George; 14 December 1895 – 6 February 1952) was King of the United Kingdom and the Dominions of the British Commonwealth from 11 December 1936 until his death in 1952. He was the last Emperor of India and the first Head of the Commonwealth.

Known as Albert until his accession, George VI was born in the reign of his great-grandmother Queen Victoria, and was named after his great-grandfather Albert, Prince Consort. George was born at York Cottage, on the Sandringham Estate in Norfolk, during the reign of his great-grandmother Queen Victoria. Within the family, he was known informally as "Bertie".