1100 PROBLEMS CREATED BY THE DUAL CLAIMS OF ENGLAND AND NORMANDY BY WILLIAM I AND DESCENDANTS

  from William I. Each person on the list is the son or daughter of the person above him or her on the list. There are many other more junior lines of descent of the family, but the crown, in theory at least, only descends through the most senior line (a major exception being the exclusion of the genealogically senior Jacobite succession by the Act of Settlement 1701).^[1] Owing to extinct lines, large parts of entire royal houses (Lancaster, Tudor, Stuart) are bypassed in the current most senior line. The numbers can be used to calculate the number of generations between two individuals


Duke of Normandy was the title given to the rulers of the Duchy of Normandy in northwestern France, which has its origins as the County of Rouen, a fief created in 911 by King Charles III "the Simple" of France for Rollo, a Norwegian nobleman and leader of Northmen.
In 1066 the reigning duke, William the Bastard, conquered England, whereupon he became known as King William I "the Conqueror". From then on, the Duke of Normandy and the King of England were usually the same person, until the King of France seized Normandy from King John in 1204. John's son, Henry III, renounced the ducal claim in the Treaty of Paris (1259).
Thereafter, the duchy formed an integral part of the French royal demesne. The Valois Kings of France started a tradition of granting the title to their heirs apparent until it was supplanted by the title Dauphin. The title was granted four times between the French conquest of Normandy by Philip Augustus and the dissolution of the French monarchy in 1792