Prince William of England is the eldest son of Prince Charles of Wales and second in line of succession. In 2011 he married Kate Middleton, currently the Duchess of Cambridge, who we can see on the right in the photo. In 2013 they had their first child and the Queen's first great-grandson, Prince George of Cambridge. You have all the information in: «Queen Elizabeth II of England and the British Royal Family«.
You have all the information in: "Queen Elizabeth II of England and the British Royal Family".