The county of the Vexin was a medieval French county that was later partitioned between the ''

Vexin Français Vexin () is an historical county of northwestern France. It covers a verdant plateau on the right bank (north) of the Seine running roughly east to west between Pontoise and Romilly-sur-Andelle (about 20 km from Rouen), and north to south ...

'' (French Vexin) and the ''

Vexin Normand Vexin () is an historical county of northwestern France. It covers a verdant plateau on the right bank (north) of the Seine running roughly east to west between Pontoise and Romilly-sur-Andelle (about 20 km from Rouen), and north to sout ...

'' (Norman Vexin).

Carolingian counts

* 753-764 Romuald, survivor of the

Battle of Poitiers (732) The Battle of Tours, also called the Battle of Poitiers and, by Arab sources, the Battle of tiles of Martyrs ( ar, معركة بلاط الشهداء, Maʿrakat Balāṭ ash-Shuhadā'), was fought on 10 October 732, and was an important battle ...

* in 790 Griffon * 796 Riferus * (date unknown) Regnauld * about 851-864 Geilenus, count of

Meulan Meulan-en-Yvelines (; formerly just ''Meulan'') is a commune in the Yvelines department in the Île-de-France region in north-central France. It hosted part of the sailing events for the 1900 Summer Olympics held in neighboring Paris, and would ...

Nibelungs

* 864-after 879 Nibelung IV * Theodoric I, his son * 886 Adelram III and Theodoric II, defenders of

Pontoise Pontoise () is a commune in the northwestern suburbs of Paris, France. It is located from the centre of Paris, in the "new town" of Cergy-Pontoise. Administration Pontoise is the official ''préfecture'' (capital) of the Val-d'Oise ''dép ...

, nephews of Theodoric I

House of Valois-Vexin-Amiens

* about 895-919 Ermenfroi, also count of

Amiens Amiens (English: or ; ; pcd, Anmien, or ) is a city and commune in northern France, located north of Paris and south-west of Lille. It is the capital of the Somme department in the region of Hauts-de-France. In 2021, the population of ...

and Valois * 915-926 Ralph I d'Ostrevent, also count of Amiens and Valois * 926-943 Ralph II, also count of Amiens and Valois, son of preceding * 943-after 992

Walter I Walter may refer to: People * Walter (name), both a surname and a given name * Little Walter, American blues harmonica player Marion Walter Jacobs (1930–1968) * Gunther (wrestler), Austrian professional wrestler and trainer Walter Hahn (born 1 ...

, also count of Amiens and Valois, apparently brother of preceding * about 998-after 1017 Walter II the White, also count of Amiens and Valois, son of preceding * about 1024-1035 Drogo, also count of Amiens, son of preceding * 1035-1063 Walter III, also count of Amiens, Valois and

Maine Maine () is a state in the New England and Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and ...

, son of preceding * 1063-1074 Ralph IV, also count of Valois and Amiens, son of

Ralph III of Valois Ralph III (french: Raoul; died 1038) was the count of Valois from his father's death until his own. He was the second son of Walter II, count of Valois, Vexin and Amiens, and his wife Adela. His father died between 1017 and 1024, leaving Vexin and ...

and grandson of Walter II * 1074-1077

Simon Simon may refer to: People * Simon (given name), including a list of people and fictional characters with the given name Simon * Simon (surname), including a list of people with the surname Simon * Eugène Simon, French naturalist and the genus ...

, also count of Valois and Amiens, he became a monk and his properties were dispersed, Vexin being partitioned between the Duke of Normandy and the King of France * 1092-1108 Louis of France, son of king

Philip I of France Philip I (23 May 1052 – 29 July 1108), called the Amorous, was King of the Franks from 1060 to 1108. His reign, like that of most of the early Capetians, was extraordinarily long for the time. The monarchy began a modest recovery from the low i ...

, made count of Vexin Français, later crowned king Louis VI of France

House of Bourbon

* 1673-1683 Louis-César de Bourbon (1673-1683), legitimized infant son of

Louis XIV of France , house = Bourbon , father = Louis XIII , mother = Anne of Austria , birth_date = , birth_place = Château de Saint-Germain-en-Laye, Saint-Germain-en-Laye, France , death_date = , death_place = Palace of ...

and

Madame de Montespan Madame may refer to: * Madam, civility title or form of address for women, derived from the French * Madam (prostitution), a term for a woman who is engaged in the business of procuring prostitutes, usually the manager of a brothel * ''Madame'' ( ...

;

Vexin Vexin () is an historical county of northwestern France. It covers a verdant plateau on the right bank (north) of the Seine running roughly east to west between Pontoise and Romilly-sur-Andelle (about 20 km from Rouen), and north to south ...