Almost all the relationships between the major royal families in modern Europe originated from Queen Victoria of England. Victoria has four sons and five daughters, born in the following order: the eldest daughter Princess Victoria became the queen of German emperor Frederick III (only 99 days in office), the eldest son of the princess was the German emperor William II who launched the First World War, and the daughter Princess Sophie was the Greek queen; The eldest son was King Edward VII of England, and one of Edward's daughters, Maud, was the queen of King Haakon VII of Norway. Alice, the second daughter, became big princess of Ludwig IV, the Grand Duke of Hesse-Rhine in southwestern Germany. One of Iris's daughters, Victoria Alice Helen Lois Beatrice (Russian name: Hesse and Bei Rhein), is the queen of the last Russian Tsar Nicholas II, and the other daughter is the grandmother of Prince Philip, the husband of Queen Elizabeth II. The second son, Prince Alfred, married Russian Grand Duchess Maria Alexandrovna, and his children included Romanian Queen Mary. The third daughter, Princess Helena, is the princess of the king of Schleswig-Holstein-Southenberg-Augustburg in northern Germany; The fourth daughter, Louise Victoria Alexandra Dagmar, married a Scottish duke who later became the Canadian governor. The third son, Prince Arthur, married Kaiser Wilhelm II's second cousin, Princess Margaret, and their eldest daughter, Margaret, married the Swedish prince. The youngest son, Prince Leopold, married Princess Helena of Waldeck-Piedmont, and their son Charles inherited the title of Duke of Saxony-Coburg-Gotha. The youngest daughter, Princess Beatrice, married King Henry of Bartonburg, and her children include Queen Victoria of Spain. When Victoria was alive, there was a family photo with relatives of these famous grandchildren. The First World War was actually fought between these relatives. In today's European royal families, Queen Elizabeth II, King Carl XVI Gustaf of Sweden, Queen Margrethe II of Denmark, King Juan Carlos I of Spain, Sophia of spanish princess, former King King Constantine of Greece, former King Mihai I of Romania, and other royal leaders such as Russia, Germany (Prussia), Yugoslavia (Serbia), Saxony-Coburg-Gotha, Hanover, Hesse and Baden are all descendants of Queen Victoria.