Saint Denis (also called Dionysius, Dennis, or Denys) is a Christian martyr and saint. In the third century, he was Bishop of Paris. He was martyred in connection with the Decian persecution of Christians, shortly after A.D. 250. After his head was chopped off, Denis is said to have picked it up and walked ten kilometres (six miles), preaching a sermon the entire way, making him one of many cephalophores in hagiology. He is venerated in the Roman Catholic Church as patron of Paris, France and as one of the Fourteen Holy Helpers. The medieval and modern French name "Denis" derives from the ancient name Dionysius.

Gregory of Tours states that Denis was bishop of the Parisii and was martyred by being beheaded by a sword. The earliest document giving an account of his life and martyrdom, the "Passio SS. Dionysii Rustici et Eleutherii" dates from c. 600, is mistakenly attributed to the poet Venantius Fortunatus, and is legendary. Nevertheless, it appears from the Passio that Denis was sent from Italy to convert Gaul in the third century, forging a link with the "apostles to the Gauls" reputed to have been sent out under the direction of Pope Fabian. This was after the persecutions under Emperor Decius had all but dissolved the small Christian community at Lutetia. Denis, with his inseparable companions Rusticus and Eleutherius, who were martyred with him, settled on the Île de la Cité in the River Seine. Roman Paris lay on the higher ground of the Left Bank, away from the river.

Denis Nikolayevich Menchov (Russian: Денис Николаевич Меньшов, pronounced as Menshov), born 25 January 1978 in Oryol, is a professional Russian road bicycle racer for Team Katusha. He is a general classification rider, a climber, and a very good time trialist. In 2005 he won the Vuelta a España, which he won for a second time in 2007. Menchov also won the centenary Giro d'Italia in 2009, and finished second in the Tour de France in 2010.

Menchov started his professional career in 2000 with the Banesto team of José Miguel Echevarri. His first success came in 2001, when he won the Tour de l'Avenir, a stage race for young professionals. A year later he won a stage in the Dauphiné Liberé. In 2003, Menchov had his breakthrough when he finished 11th in the Tour de France, and won the youth competition (maillot blanc). 2004 was his last year at Banesto and his most successful. He won Vuelta al País Vasco, a stage in Vuelta a Aragón, a stage in Paris–Nice and stage five in the 2004 Vuelta a España, from Zaragoza to Morella.