Queen Elizabeth ll was the daughter of King George Vl and Queen Mother. She had an elder sister Queen Margaret and was married to Prince Philip. The Queen had 4 children, three sons and one daughter.
Below is the Family Tree of Late Queen Elizabeth ll

Queen Elizabeth
Queen was the third generation in succession and became the heir to the throne in 1936. She married Prince Philip of Greece and Denmark and had four children. Queen sat on the throne after her father’s death and was the longest reigning and longest living British Monarch in history.
Prince Philip
Prince Philip was the husband of Queen Elizabeth and her biggest supporter of the monarchy. Prince Philip was the longest surviving Male British Monarch in history.
King Charles lll & Princess Diana
King Charles lll is among one the sons of the Queen. He is the current King of the United Kingdom and head of the Commonwealth; he is the eldest son of Queen Elizabeth and King Philip born in 1948 in Buckingham Palace. He was married to Princess Diana Spencer born on July 1, 1961, they both met at the age of 13 and got married in July 1981. They had two children altogether.
Prince Andrew & Sarah Ferguson
Prince Andrew is the third child and second son of the Queen and the King. He served in the Royal Navy for many years and was awarded the title of Commando. He married Sarah Ferguson in 1986 and has two daughters Beatrice and Eugenie.
Princess Anne & Mark Philips
Princess Anne is the second child and only daughter of the Queen and the King. She was the most hardworking and sincere member of the Royal Family. In 1973 the princess married Captain Phillips and they took their family further with two children.
Prince Edward & Sophie
Prince Edward is the youngest child of the Royal Queen of the United Kingdom. He graduated from Cambridge University and worked in the Marines. Sophie Jones married Prince Edward and had two children. Prince Edward handled all the responsibilities of the Royal after his father retired.
Prince Willam & Catherine
Prince William is the son of the current king of the United Kingdom Prince Charles & Princess Diana. He is the eldest son and the current heir and the first in line to the British throne. Before entering the royal monarchy, he was a search and rescue pilot. He got married to long-time girlfriend Catherine Middleton and they have three children.
Prince Harry & Meghan
The youngest son of Prince and Princess is Prince Harry and is fifth in the line of succession. Like the elder brother he also served in the royal army and has fought various wars. He married American actress Meghan Mackle at a royal wedding and the couple has two children.
Future Generations:
Prince George, Princess Charlotte & Prince Louis
Prince George is the first and eldest child of Prince William and Catherine Duchess of Cambridge. He was born on 2nd July 2013 and is second in the line of succession.
Princess Charlotte is the second and only daughter of Prince William Catherine, Duchess of Cambridge. She was born on 2nd May 2015 and is third in the line of succession.
Prince Louis is the youngest child of Prince and Duchess Of Cambridge. Born on 23rd April 2018 and is fourth in line of succession.
Archie Harison & Lilibet Diana
Archie Harison is the first child of the Duke and Duchess born on 6th May 2019, little prince is sixth in the line of succession.
Lilibet Diana is the second child and younger sister of Archie Harison and is seventh in the line of succession