Elizabeth Bowes-Lyon, Queen of the United Kingdom and Queen Mother 

Elizabeth Angela Marguerite Bowes-Lyon (4 August 1900 -- 30 March 2002) was the queen consort of King George VI from 1936 until her husband's death in 1952, after which she was known as Queen Elizabeth The Queen Mother, to avoid confusion with her daughter, Queen Elizabeth II. She was the last queen consort of Ireland and empress consort of India.
Born into a family of Scottish nobility as The Honourable Elizabeth Bowes-Lyon, she became Lady Elizabeth Bowes-Lyon when her father inherited the Earldom of Strathmore and Kinghorne in 1904. She came to prominence in 1923 when she married Albert, Duke of York, the second son of King George V and Queen Mary. As Duchess of York, she -- along with her husband and their two daughters Elizabeth and Margaret -- embodied traditional ideas of family and public service. She undertook a variety of public engagements, and became known as the "Smiling Duchess" because of her consistent public expression.
In 1936, her husband unexpectedly became King when his brother, Edward VIII, abdicated in order to marry the American divorcée Wallis Simpson. Queen Elizabeth accompanied her husband on diplomatic tours to France and North America before the start of World War II. During the war, her seemingly indomitable spirit provided moral support to the British public. In recognition of her role as an asset to British morale, Adolf Hitler described her as "the most dangerous woman in Europe". After the war, her husband's health deteriorated and she was widowed at the age of 51.
On the death of her mother-in-law Queen Mary in 1953, with her brother-in-law living abroad and her elder daughter aged 25, Elizabeth became the senior member of the royal family and assumed a position as family matriarch. In her later years, she was a consistently popular member of the family, when other members were suffering from low levels of public approval.She continued an active public life until just a few months before her death at the age of 101, seven weeks after the death of her younger daughter, Princess Margaret.