Granville Leveson-Gower, 3rd Earl Granville

From the Wikipedia page

Granville George Leveson-Gower, 3rd Earl Granville GCMG GCVO PC (4 March 1872–21 July 1939) was a British diplomat.

The eldest son of the 2nd Earl Granville, Leveson-Gower was educated at Eton and joined the diplomatic service in 1893 as an attaché to Berlin. He was later attaché to: Cairo in 1897, Vienna in 1898, The Hague in 1900, Berlin again in 1904, Brussels in 1908, Berlin again in 1911, Paris in 1913, Salonica in 1916 (to the National Defence government), Athens in 1917, Copenhagen in 1917, The Hague again in 1926 and Ambassador to Belgium from 1928–33.

He had also been a Lord-in-Waiting to Queen Victoria in 1895, to King Edward VII from 1905–10 and to King George V from 1910–15. On 27 September 1900, he had married Nina Ayesha Baring but died without issue and his titles passed to his brother, William.