Elizabeth Angela Marguerite Bowes-Lyon (4 August 1900 -- 30 March 2002) was the wife of King George VI and the mother of Queen Elizabeth II and Princess Margaret, Countess of Snowdon. She was Queen of the United Kingdom and the Dominions from her husband's accession in 1936 until his death in 1952, after which she was known as Queen Elizabeth The Queen Mother, to avoid confusion with her daughter. She was the last Empress of India.

Answer this question based on the passage: what is the queen mother's full name? Let's have some stream of consciousness first.
To answer the above question, the relevant sentence is: Elizabeth Angela Marguerite Bowes-Lyon (4 August 1900 -- 30 March 2002) was the wife of King George VI and the mother of Queen Elizabeth II and Princess Margaret, Countess of Snowdon. So, the answer is Elizabeth Angela Marguerite Bowes - Lyon.