The County of Savoy and the Plantaganet monarchy of England had been linked by the marriage of which person, also known as Henry of Winchester, was King of England, Lord of Ireland and Duke of Aquitaine from 1216 until his death, and Eleanor of Provence in 1236? 
Savoyard knights in the service of Edward I: The County of Savoy and the Plantaganet monarchy of England had been linked by the marriage of Henry III of England and Eleanor of Provence in 1236. Henry III of England: Henry III (1 October 1207 – 16 November 1272), also known as Henry of Winchester, was King of England, Lord of Ireland and Duke of Aquitaine from 1216 until his death.
Henry III of England