Please answer the following question: Odo William Leopold Russell 1st Baron Ampthill GCB GCMG PC (20 February 1829 25 August 1884) styled Lord Odo Russell between 1872 and 1881 was a British diplomat and the first British Ambassador to the German Empire. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Office Holder