Sir William Hutt Curzon Wyllie, KCIE, CVO (5 October 1848 – 1 July 1909) was an Indian army officer, and later an official of the British Indian Government. Over a career spanning three decades, Curzon Wyllie rose to be Lieutenant Colonel in the British Indian Army and occupied a number of administrative and diplomatic posts. He was the British resident to Nepal and the Princely state of Rajputana, and later, the political aide-de-camp to the Secretary of State for India, Lord George Hamilton. Curzon Wyllie was assassinated on 1 July 1909 in London by the Indian revolutionary Madan Lal Dhingra.
Curzon Wyllie was born at Cheltenham on 5 October 1848 to General William Wyllie (1802–1891) and his wife, Amelia (1806–1891). Third and youngest son of five children, Wyllie was educated at Marlborough College (1863–4) and the Royal Military College, Sandhurst (1865–6) before joining the army in October 1866 as ensign 106th foot (Durham Light Infantry), subsequently arriving in India in 1867. Both his elder brothers, John William Shaw Wyllie (1835–1870) and Francis Robert Shaw Wyllie (1837–1907) served in India. The latter Francis Shaw Wyllie joined the Bombay civil service, became under-secretary to the Bombay government, and died in London in February 1907.
Arriving in India in February 1867, Wyllie was promoted to lieutenant in October 1868 and joined the Indian staff corps in 1869. He was posted to the 2nd Gurkha regiment (the Sirmoor Rifles, later the 2nd King Edward's Own Gurkhas) for a year. In 1870, Wyllie was selected for civil and political employment and appointed to the Oudh commission, serving under General Barrow and Sir George Couper.
Wyllie was promoted to captain in October 1878 and transferred to the foreign department in January 1879, serving as cantonment magistrate of Nasirabad, assistant commissioner in Ajmer-Merwara, and subsequently as the assistant to Sir Robert Groves Sandeman, the governor-general's agent in Baluchistan. He was a part of Major-General Sir Robert Phayre's contingent in the Second Anglo-Afghan War when his actions earned him mentions in the Viceroy's dispatches. After the war, Wyllie was appointed the military secretary to the governor of Madras, William Patrick Adam (later also his brother-in-law) from December 1880 until Adam's death in the following May. In December 1881, Wyllie married Katharine Georgiana Carmichael, second daughter of David Fremantle Carmichael of the Indian Civil Service. Made CIE in 1881, he was promoted major in October 1886 and lieutenant-colonel in 1892.