German Empress Augusta Victoria, Prince Karl of Prussia. Augusta Victoria gave birth to seven sons and one daughter. Her grandson, Prince Friedrich Karl competed in equestrian sports in the 1912 Olympics and was later killed fighting for Germany in WWI.
Kaiser Wilhelm II, his wife Augusta Viktoria and their only daughter and youngest child of Viktoria Louise of Prussia. (Kaiser Wilhelm II was a grandson of Queen Victoria and thus, a first cousin of King George V of Britain