What year did Henry FitzClarence's mother die?
Henry FitzClarence Henry Edward FitzClarence (27 March 1795 – September 1817), was the second eldest illegitimate son of William IV by his longtime mistress Dorothea Jordan. Born in Petersham, he died unmarried in India in 1817 at age 22 before his father's death.
Beatrix Beauclerk, Marchioness of Waterford Beatrix Frances Beauclerk, Duchess of St Albans, Marchioness of Waterford, GBE, DGStJ (25 March 1877 – 5 August 1953), born Lady Beatrix Frances Petty-FitzMaurice, was a daughter of the 5th Marquess of Lansdowne and his wife, Maud. She was named after her maternal aunt, Beatrix Frances Lambton, Countess of Durham (born Lady Beatrix Frances Hamilton), Lady Lansdowne's favourite sister.