The British Royal Family faced a serious problem during the First World War because of its blood ties to the ruling family of Germany, Britain's prime adversary in the war. Before the war, the British royal family had been known as the House of Saxe-Coburg and Gotha. In 1910, George V became King on the death of his father, King Edward VII, and remained king throughout the war. He was the first cousin of the German Kaiser Wilhelm II, who came to symbolise all the horrors of the war. Queen Mary, although British like her mother, was the daughter of the Duke of Teck, a descendant of the German Royal House of Wurttemberg. During the war H.G. Wells wrote about Britain's "alien and uninspiring court", and George famously replied: "I may be uninspiring, but I'll be damned if I'm alien."

Who was the queen of britain during ww1? Let's have some stream of consciousness first.
The relevant information to answer the above question is: Queen Mary, although British like her mother, was the daughter of the Duke of Teck, a descendant of the German Royal House of Wurttemberg. So, the answer is Queen Mary.