Sir Odo William Theophilus Russell KCMG KCVO CB (3 May 1870 – 23 December 1951) was a British diplomat who was ambassador to Switzerland, the Vatican and the Netherlands.
Russell was the second son of Odo Russell, later the first Baron Ampthill, by Lady Emily Villiers, daughter of George Villiers, 4th Earl of Clarendon and Lady Katherine Grimston (daughter of the 1st Earl of Verulam).
[1] His paternal grandparents were Maj.-Gen. Lord George Russell (second son of the 6th Duke of Bedford) and Elizabeth Anne Rawdon (niece of the 1st Marquess of Hastings).
[1] Russell entered the Diplomatic Service in 1892 and served in Rome, Athens, St Petersburg, Berlin, Buenos Aires and Vienna, where he held the rank of counsellor from 1909 to 1915.
[6] On 25 June 1910, while he was stationed in Vienna, Russell married Countess Marie Louise von Rex (10 July 1890 – 16 November 1966), daughter of Count Rudolf Karl Caspar von Rex, the Saxon Minister at the Austro-Hungarian Court.