Osborne Beauclerk, 12th Duke of St Albans

Osborne de Vere Beauclerk, 12th Duke of St Albans (16 October 1874 – 2 March 1964) was a British peer and Army officer.

The Duke was styled Lord Osborne Beauclerk from 1874 to 1934.

Lord Osborne Beauclerk was the son of William Beauclerk, 10th Duke of St Albans; his mother was Grace Bernal-Osborne of Tipperary, Ireland, a descendant of the politician and actor Ralph Bernal.

Lord Osborne (aka Obby Beauclerk) served as a Captain in the 17th Lancers during the Boer War, returning to the United Kingdom in December 1901. In 1911 and 1913 he set off on a trip to British Columbia, Canada where he was involved in a prospective mining investment; part of his time there was spent camping with partners British travelogue writer Warburton Pike and the American mining engineer Marshall Latham Bond.

At the outbreak of World War I, Captain Beauclerk was appointed Aide-de-Camp to Field Marshal Sir Douglas Haig, serving in France.

On 19 August 1918, he married Beatrix Beresford, Dowager Marchioness of Waterford, GBE, DStJ, and daughter of the 5th Marquess of Lansdowne. He succeeded his half-brother in the family titles in 1934.

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