German prince, he was the first child of Ernest Louis (Ernst Ludwig), Grand Duke of Hesse and his second wife, Princess Eleonore of Solms-Hohensolms-Lich. He was a nephew of Empress Alexandra, wife of Emperor Nicholas II (or Nikolai II) of Russia.
On 2 February 1931 at Darmstadt, Georg, a great-grandson of Queen Victoria, married his first cousin once-removed, Princess Cecilie of Greece and Denmark, daughter of Prince Andrew of Greece and Denmark and Princess Alice of Battenberg (and thus a sister of Prince Philip, Duke of Edinburgh), a great-great-granddaughter of Queen Victoria and Prince Albert. They had four children.
On 1 May 1937 Georg Donatus and Princess Cecilie both joined the Nazi Party.
On 16 November 1937, Georg Donatus, Cecilie, their two young sons, Georg’s mother Grand Duchess Eleonore, the children’s nurse, a family friend, a pilot and two crewmen, flew from Darmstadt bound for the United Kingdom, where Georg’s younger brother Prince Louis was due to be married. The aeroplane hit a factory chimney near Ostend and crashed into flames, killing all those on board. Cecilie was heavily pregnant with her fourth child at the time of the crash, and the remains of the newborn baby were found in the wreckage, indicating that Cecilie had gone into labour during the flight; the Belgian inquiry into the crash suggested that the pilot was attempting to land in Ostend despite the poor weather conditions because of the birth.
He is depicted in the 2017 second season of Netflix series The Crown by German actor August Wittgenstein.
Link to Wikipedia biography