Prince Albert Victor
Prince Albert Victor, Duke of Clarence and Avondale (Albert Victor Christian Edward "Eddy"; 8 January 1864 - 14 January 1892), was the eldest child of the Prince and Princess of Wales (later King Edward VII and Queen Alexandra, and grandson of the reigning British monarch, Queen Victoria. From the time of his birth, he was second in the line of succession to the British throne, but never became king because he died before his father and grandmother.
After two unsuccessful courtships (to his cousin Tsarina Alexandra in 1889 - she would later marry Tsar Nicholas II of Russia, another of Albert Victor's cousins, in 1894 -, and with Princess Hélène of Orléans in 1890), he was engaged to be married to Queen Mary in late 1891. A few weeks later, he died during an influenza pandemic. Mary later married his younger brother, who became King George V in 1910.