Her presence at court further decreased as she aged. Devastated by the death of her favourite son, Maurice, during the First World War in 1914, she began to retire from public life. In response to war with Germany, George V changed the name of the royal house from Saxe-Coburg and Gotha to Windsor and at the same time adopted it as the family surname, to downplay their German origins. Subsequently, Beatrice and her family renounced their German titles; Beatrice stopped using the style "Princess Henry of Battenberg", reverting to only using her birth style, "HRH The Princess Beatrice". Her sons gave up their style, "Prince of Battenberg". Alexander, the eldest, became Sir Alexander Mountbatten and was later given the title Marquess of Carisbrooke in the Peerage of the United Kingdom. Her younger son, Leopold, became Lord Leopold Mountbatten and was given the rank of a younger son of a marquess. He was a haemophiliac, having inherited the "royal disease" from his mother, and died during a knee operation in 1922 one month short of his 33rd birthday.