Geoffrey Thomas Taylour, 4th Marquess of Headfort DL, JP, FZS (12 June 1878 – 29 January 1943),[1] styled Lord Geoffrey Taylour until 1893 and Earl of Bective between 1893 and 1894, was a British politician and Army officer.

Styled Lord Geoffrey Taylour from birth, he was the son of Thomas Taylour, 3rd Marquess of Headfort, by his second wife Emily Constantia, daughter of the Reverend Lord John Thynne.

[7][8] Headfort was president of the Royal Horticultural Society of Ireland for thirty years from 1915 to 1945, winning the Society's Gold Medal of Honour for distinguished services to horticulture in Ireland in 1939.

[9] Rosie Boote, a young singer who appeared in The Messenger Boy in 1900 under her professional name of Miss Rosie Boote, so charmed the young Marquess that he married her on 11 April 1901.

[10] Their marriage was unusual: Rose was a Catholic from a humble background, while her husband was a Protestant aristocrat.