Yolande de Dreux, Countess of Penthièvre and of Porhoet

Yolande de Dreux, Countess of Penthièvre and of Porhoet (late 1218 – 10 October 1272) was a Breton noblewoman and a suo jure Breton countess within the sovereign Duchy of Brittany. Yolande had been betrothed to King Henry III of England in 1226 at the age of seven years. but married Hugh XI of Lusignan, the eldest uterine half-brother of Henry III. Through Hugh, she became Countess of La Marche and of Angoulême. She was the mother of seven children. From 1250 to 1256, she acted as Regent of La Marche and Angoulême for her son, Hugh XII of Lusignan.

Yolande was born in Dreux, France at the end of 1218, the only daughter of Pierre de Dreux and Alix, Duchess of Brittany. She had two brothers, John I, Duke of Brittany and Arthur of Brittany (1220–1224). By her father's second marriage to Nicole, she had a half-brother, Olivier de Braine (1231–1279). Her mother, Alix, had died on 21 October 1221, when Yolande was not quite three years old. Yolande's paternal grandparents were Robert II, Count of Dreux and Yolande de Coucy, and her maternal grandparents were Guy de Thouars and Constance, Duchess of Brittany.

As her dowry, In 1236 Yolande received the titles of Countess of Penthièvre, Dame de la Fère-en-Tardenois, de Chailly, and de Longjumeau which she held suo jure from her brother John I, Duke of Brittany and her father, Pierre Mauclerc, acting as his Regent. Her brother also granted her the title of suo jure Countess of Porhoet.

Sometime before 19 October 1226, when she was seven years old, Yolande was betrothed to King Henry III of England. The marriage never took place. Blanche, regent of France, wanted to prevent Henry from gaining land or influence in France, and so forced Yolande's father to change her betrothal. Under this influence, Yolande's second betrothal occurred in March 1227 to John of France, Count of Anjou, the son of King Louis VIII of France and Blanche. The engagement was ended when John died aged thirteen in 1232.