They are the current British Royal Family. They belonged to the German house Saxe-Coburg-Gotha, but they changed their name in 1917, after World War I broke out.
Queen Elizabeth II was the last British Queen. She was the longest reigning and oldest monarch in the world: she was 70 years in the throne.
She was one of the most important British monarchs. She succeeded in seating her grandchildren on the thrones of most countries in Europe.