Sir Oswald Mosley, 5th Baronet (29 December 1873 â 21 September 1928), was a British Army officer, aristocrat and the father of Oswald Mosley, leader of the British Union of Fascists (BUF).
Born on 29 December 1873 at Fryers House, near Beaumaris, Anglesey, he was the only son of Sir Oswald Mosley, 4th Baronet, of Rolleston Hall, Rolleston-on-Dove, Staffordshire, and Elizabeth Constance, Lady Mosley (née White), daughter of Sir William White. He gained the rank of Captain in the 1/1st Derbyshire Yeomanry and served in Egypt during the First World War until invalided in 1916. He succeeded his father as 5th Baronet Mosley, of Ancoats (1781, BGB), in 1915.
Mosley became estranged from both his wife and his father, the latter describing him as a "gloomy blackguard". His wife's family, the Heathcotes, thought of him as an "ogre".
His interests were in shooting, boxing, motoring and racing.
He died at his residence, Hilton Lodge, near Derby, on 21 September 1928. His will was proven by probate at the Derby District Registry; his estate valued at ã5000, which he left to his ageing mother and sister. He was succeeded in the baronetcy by his eldest son Oswald.
On 12 December 1895, Mosley married Katharine Maud Edwards-Heathcote (1873âÂÂ1948), the daughter of Capt. Justinian Edwards-Heathcote, of Apedale Hall. She belonged to the wealthy Staffordshire Heathcote family, who held significant property around Newcastle-under-Lyme and Stoke-on-Trent. Their marriage was an unhappy one. Nonetheless, it produced three sons: