| Honorific-Prefix: | Her Grace |
| The Duchess of St Albans | |
| Birth Name: | Lady Beatrix Frances Fitzmaurice |
| Birth Date: | 25 March 1877 |
| Other Names: | The Marchioness of Waterford Lady Osborne Beauclerk |
| Spouse: | |
| Children: | 6 |
| Parents: | Henry Petty-Fitzmaurice, 5th Marquess of Lansdowne Lady Maud Hamilton |
| Nationality: | British |
Beatrix Frances Beauclerk, Duchess of St Albans, Marchioness of Waterford, GBE, DGStJ (25 March 1877 – 5 August 1953), born Lady Beatrix Frances Fitzmaurice, was a member of the Anglo-Irish aristocracy, both by birth and through her two marriages.
Beatrix was a daughter of the 5th Marquess of Lansdowne and his wife Maud.[1]
She was named after her maternal aunt, Beatrix Frances Lambton, Countess of Durham (born Lady Beatrix Frances Hamilton), Lady Lansdowne's favourite sister.
On 16 October 1897, she married Henry Beresford, 6th Marquess of Waterford (and would be styled as Marchioness of Waterford).[1] Their wedding was a high society affair, noted in contemporary magazines.[2]
The couple had six children:
The Marquess died in 1911, and on 19 August 1918, Beatrix remarried, her second husband being Osborne Beauclerk, 12th Duke of St Albans, familiarly known as "Obby", and they set up home at the family's property at Newtown Anner House in Clonmel, County Tipperary.[3] Through this marriage, she became Lady Osborne Beauclerk, but was better known as Beatrix Beauclerk. She became the Duchess of St. Albans when her husband succeeded to the ducal title in 1934.[1]
She was appointed to the Orders of the British Empire (Knight Grand Cross (G.B.E.), 1919) and the Hospital of St. John of Jerusalem (Dame of Grace, D.G.St.J.)[4] These honours were given in recognition of her work as a hospital administrator during the First World War.[5] She died of heart disease; her husband's reaction to her death was greater than friends of the couple had anticipated.[6]