Admiral of the Fleet Louis Francis Albert Victor Nicholas Mountbatten , 1st Earl Mountbatten of Burma ( born Prince Louis of Battenberg ; 25 June 1900 -- 27 August 1979 ) -- known informally as Lord Mountbatten -- was a British statesman and naval officer , an uncle of Prince Philip , Duke of Edinburgh , and second cousin once removed to Elizabeth II .
Admiral of the Fleet Louis Francis Albert Victor Nicholas Mountbatten , 1st Earl Mountbatten of Burma , KG GCB OM GCSI GCIE GCVO DSO PC FRS ( born `` Prince Louis of Battenberg '' ; 25 June 1900 -- 27 August 1979 ) , known informally as Lord Mountbatten , was a British statesman and naval officer , an uncle of Prince Philip , Duke of Edinburgh , and second cousin once removed to Elizabeth II .