Which of Queen Elizabeth II's children was born in the 1950s?

Princess Anne was the only one of Queen Elizabeth II's children to be born in the 1950s.

Anne was born at Clarence House on 15 August 1950 at 11:50 am, as the second child and only daughter of Princess Elizabeth, Duchess of Edinburgh, and Philip, Duke of Edinburgh. She was the second grandchild of King George VI and Queen Elizabeth. Anne was baptised in the Music Room of Buckingham Palace on 21 October 1950, by Archbishop of York, Cyril Garbett.

Elizabeth II was born on April 21, 1926, in London, England, the oldest child of the Duke of York and his wife, Elizabeth. Her father became King George VI of Great Britain and Ireland in 1936 when his older brother Edward VIII (1894–1972) gave up the throne. Along with her younger sister, Margaret, Elizabeth was educated at home by private tutors. She particularly liked history, languages, and music. She later took an interest in national affairs. As a teenager Elizabeth began to make her first public appearances. She married Philip Mountbatten in November 1947, and they had four children—Prince Charles (1948), Princess Anne (1950), Prince Andrew (1960), and Prince Edward (1964).