Final answer:
William the Conqueror was responsible for introducing Norman French influence to England in the eleventh century, after his victory at the Battle of Hastings in 1066.
Step-by-step explanation:
The individual who brought a significant Norman French influence to England in the eleventh century was William the Conqueror.
In 1066, William, the Duke of Normandy, ascended to the throne after his victory at the Battle of Hastings. This event marked a profound turning point in English history which led to the establishment of Norman rule in England.
The Normans were the descendants of Vikings who had settled in the region of Normandy in northern France. William's conquest replaced the Old Anglo-Saxon order and instituted a new feudal system, with cultural and linguistic influences that persisted for centuries.