Sir Archibald Hamilton, 5th Baronet

Sir Charles Edward Archibald Watkin Hamilton, 5th and 3rd Baronet (10 December 1876 – 18 March 1939), known from 1923 as Sir Abdullah Hamilton, was a British aristocrat and convert to Islam.

He was the son of Sir Edward Archibald Hamilton, 4th Baronet of Trebishun, Breconshire and 2nd Baronet of Marlborough House, Hampshire (1843–1915) and his wife Mary Elizabeth Gill. He inherited both baronetcies upon the death of his father in 1915. great-grandson of Admiral Sir Edward Joseph Hamilton, 1st Baronet Hamilton of Marlborough House, direct descendant of the Duke of Abercorn and also Lord Hamilton who married Princess Mary Stewart of Scotland, daughter of James II of Scotland.

Marriages and children Hamilton's son George FitzGeorge Hamilton seated on the lap of his wife Olga FitzGeorge (center) with her grandfather Prince George, Duke of Cambridge (left) and her father Sir Adolphus FitzGeorge (right) in 1900. He was married three times and twice divorced.

Olga FitzGeorge Sir Archibald married Olga Mary Adelaide FitzGeorge, daughter of Rear-Admiral Sir Adolphus FitzGeorge KCVO and Sophia Jane Holden, granddaughter of the Duke of Cambridge and first cousin to Queen Victoria on 18 December 1897 in London. The marriage resulted in two children, George Edward Archibald Augustus FitzGeorge Hamilton (30 December 1898 – 18 May 1918) whose baptism was attended by Queen Mary and King George V who along with the Duke of Cambridge were pledged to be his godparents. He was killed in action in May 1918. but she divorced him in 1915.

Lilian Austen In 1927, Sir Archibald married Lilian Maud (b. 1880 – d. 1964), daughter of William Austen, of Sydenham, Kent.

Conversion to Islam Sir Archibald converted to Islam on 20 December 1923. He noted that "...the beauty and the simple purity of Islam have always appealed to me. I could never, though born and brought up as a Christian, believe in the dogmatic aspect of the Church... I found that both the Church of Rome and the Church of England were of no real use to me" and that having converted to Islam he felt "a better and truer man".

Death Hamilton's grave (foreground) at Brookwood Cemetery. The grave of Rowland Allanson-Winn behind He died on 18 March 1939 at the age of 62, and is buried at the Brookwood Cemetery alongside Rowland Allanson-Winn, 5th Baron Headley, they having been "great friends in life" and "close comrades-in-arms in the cause of Islam".