The U.K and the Royal Family.

The U.K is a political Union of 4 Countries: England, Scotland, Wales and North Ireland.
The capital of the U.K is London. London is also the capital of England, in fact the Government resides in London.
The U.K is a constitutional monarchy with a Parliament. The Parliament governs the country, not the Monarch. The Parliament in the U.K. is divided into two Houses: the House of Lords and the House of Commons.
The Monarch of the U.K is Queen Elizabeth II of Windsor who belongs to the Windsor dynasty. Originally the family name was different, it was not Windsor; originally the family name was German, Saxe-Coburg and Gotha. Elizabeth's Grandfather, the king,  changed the name to Windsor in 1917, because the German surname was very unpopular. The first Windsor was King George V, after the new King was Edward VIII for a short time, because he abdicated in favour of his brother George VI, Elizabeth's father. When he died, Elizabeth became the new Queen.
She married Prince Philip, Duke of Edinburgh. Edinburgh is the capital of Scotland.
They've got four children: Prince Charles, Prince of Wales (the first son has the title of Prince of Wales.), Princess Anne, Prince Andrew, Duke of York, Prince Edward, Earl of Wessex.
Prince Charles married Lady Diana Spencer in 1981. They have two children, Prince William and Prince Harry. Two years ago Prince William married Kate Middleton and they have one child, George Alexander Louis.

She's Queen Elizabeth.

They are Diana and Charles with their two children William and Harry!

Kate, William and George.