Sir Ponsonby Moore Crosthwaite (13 August 1907 – 27 April 1989) was a British diplomat, and ambassador to Lebanon and Sweden.
Career Ponsonby Moore Crosthwaite was educated at Rugby School and Corpus Christi College, Oxford. He held a Laming Fellowship at The Queen's College, Oxford, in 1931 and joined the Diplomatic Service in 1932. He served at Baghdad, Moscow, Madrid and Athens before being appointed Deputy UK Representative to the United Nations in New York 1952–58, Ambassador to Lebanon 1958–63 and Ambassador to Sweden 1963–66.
Honours Moore Crosthwaite was appointed a Companion of the Order of St Michael and St George (CMG) in the 1951 New Year Honours and promoted to Knight Commander of the Order (KCMG)) in the 1960 New Year Honours.
References CROSTHWAITE, Sir (Ponsonby) Moore, Who Was Who, A & C Black, 1920–2008; online edn, Oxford University Press, Dec 2012