Helen Vincent, Viscountess D'Abernon
Helen Venetia Vincent, Viscountess D'Abernon (née Duncombe) (1866 – 16 May 1954) was a British peeress, socialite and diarist.
Helen was the daughter of William Duncombe, 1st Earl of Feversham, of Ryedale and Mabel Violet Graham, born at their estate of Duncombe Park in Helmsley, North Yorkshire, England. She and her sister, Hermione, Duchess of Leinster, were renowned as leading beauties in their circle. 
Helen married Sir Edgar Vincent, then a governor of the Imperial Ottoman Bank in Constantinople on 24 September 1890. In 1899 he was elected a Member of Parliament for Exeter. Lady Helen, in that period, was "the most celebrated hostess of her age and was 'by reason of her outstanding beauty, intelligence and charm, one of the most resplendent figures'".
Activities and later years
Helen was associated with "the Souls", a salon of noted intellectuals of the day which included Arthur Balfour, George Curzon, Henry James and Edith Wharton. She is believed to have been the model for the characters of Lady Thisbe Crowborough in Max Beerbohm's story Hilary Maltby and Stephen Braxton in Seven Men (1919) and for Lady Irene Silvester in Maurice Baring's story "A Luncheon Party" (1925).
In 1904 during an extended visit to Venice, Lady Helen's portrait was painted by John Singer Sargent. That work is now part of the permanent collection of the Birmingham Museum of Art in Birmingham, Alabama, USA.
During World War I Lady Helen trained as a nurse anaesthetist and treated thousands of patients. She accompanied her husband (created 1st Baron D'Abernon in 1914) as he served on the Interallied Mission to Poland and as the British Ambassador to the Weimar Republic in the early 1920s. During this time the Baroness kept a diary of her experiences, parts of which were published in 1946 as Red Cross and Berlin Embassy, 1915-1926: Extracts from the Diaries of Viscountess D'Abernon.
At the end of his diplomatic mission, Sir Edgar was elevated to 1st Viscount D'Abernon on 1 January 1926, and then also succeeded his brother, Francis, as 16th Baronet of Stoke d'Abernon. The Vincents did not have children and Sir Edgar's titles died with him in 1941. Lady D'Abernon died at age 84 on 16 May 1954.
- "Lady Helen Vincent,Viscountess d’Abernon with her sister Hermione, Duchess of Leister". Grand Ladies.
- Rintoul, M. C. (1993) Dictionary of Real People and Places in Fiction. London: Taylor & Francis. p. 919. ISBN 0-415-05999-2 
- "Abernon, Helen Venetia Duncombe, Lady d’ (1866 - 1954)". A Bit of History. Retrieved 26 July 2013.
- Antoon, Donna and James Wetenhall (1993) "Lady Helen Vincent, Viscountess d'Abernon" in Masterpieces East & West. Birmingham: Birmingham Museum of Art. ISBN 0-931394-38-4
- The London Gazette: . 10 July 1914. Retrieved 26 February 2009.
- Vincent, Lady Helen, Viscountess d'Abernon (1946) Red Cross and Berlin Embassy, 1915-1926: Extracts from the Diaries of Viscountess D'Abernon. London: J. Murray
- The London Gazette: . 29 December 1925. Retrieved 26 February 2009.