Louis I of Anjou
Louis I (23 July 1339 – 20 September 1384) was the second son of John II of France and Bonne of Bohemia.
Born at the Château de Vincennes, Louis was the first of the Angevin branch of the French royal house.
His father appointed him Count of Anjou and Count of Maine in 1356, and then raised him to the title Duke of Anjou in 1360 and Duke of Touraine in 1370.
In 1382, as the adopted son of Joanna I of Naples, he succeeded to the counties of Provence and Forcalquier.
He also inherited from her a claim to the kingdoms of Naples and Jerusalem.
He was already a veteran of the Hundred Years' War against the English when he led an army into Italy to claim his Neapolitan inheritance.
He died on the march and his claims and titles fell to his son and namesake, Louis II, who succeeded in ruling Naples for a time.
Fulk II, Count of Anjou
Fulk II of Anjou( c. 905 — 960), called(" the Good") was Count of Anjou from 942 to his death.
Alix of France
Alix of France( July – August 1150 – 1197/1198) was countess consort of Blois by marriage to Theobald V, Count of Blois.
She was regent of Blois during the absence of her spouse in 1190- 1191, and regent during the minority of Louis I, Count of Blois from 1191 until 1197.
Theobald III, Count of Blois
Theobald III of Blois( French:" Thibaut")( 1012–1089) was count of Blois, Meaux and Troyes.
He was son of Odo II, Count of Blois and Ermengarde of Auvergne.
Theobald V, Count of Blois
Theobald V of Blois( 1130 – 20 January 1191), also known as Theobald the Good, was Count of Blois from 1151 to 1191.
Theobald II of Blois
Theobald II, Count of Blois( Thibaut II; c. 985 – 11 July 1004) was the eldest son and heir of Odo I, Count of Blois, and Bertha of Burgundy.
The stepson of Robert II of France, he became Count of Blois, Châteaudun, Chartres and Reims after the death of his father in 996.
Theobald II left no heirs; on his death, he was succeeded by his younger brother, Odo II, Count of Blois.
John II, Duke of Lorraine
John II of Anjou( Nancy, August 2, 1426 – December 16, 1470, Barcelona) was Duke of Lorraine from 1453 to his death.
He was the son of René of Anjou and Isabella, Duchess of Lorraine.
Mary, Countess of Blois
Mary, Countess of Blois, also known as" Marie of Avesnes",( 1200 – 1241) was countess of Blois from 1230 to 1241.
She was the daughter of Walter of Avesnes and Margaret of Blois.
In 1226, Mary married Hugh I of Châtillon, a count from Châtillon- sur- Marne, son of Gaucher III of Châtillon and Elisabeth of Saint Pol.
They had five children:
Her eldest son John, succeeded her in Blois.
Marie of Blois, Duchess of Anjou
Marie of Blois (1345-1404) was a daughter of Joanna, Duchess of Brittany and Charles, Duke of Brittany.
Through marriage to Louis I, Duke of Anjou, she became Duchess of Anjou, Countess of Maine, Duchess of Touraine, titular Queen of Naples and Jerusalem and Countess of Provence.
Theobald VI, Count of Blois
Theobald VI of Blois( French:" Thibaut")( died 1218) was count of Blois and Clermont- en- Beauvaisis from 1205 to 1218.
He was son of Louis I of Blois and Catherine of Clermont.
Theobald married twice: with Maud of Alençon and with Clemence of Roches, but remained childless.
Clemence married Geoffrey VI, Viscount of Châteaudun, as her second husband.
Theobald fought the Moors in Castile.
During the campaign he contracted leprosy and returned home.
After living withdrawn in his castle in La Ferté- Villeneuil for a few years he died in 1218, leaving his possessions to his aunts Margaret and Isabelle.
The northern part of Blois was erected into the County of Chartres for Isabelle; Margaret received the remainder of the County of Blois, and he sold Clermont to the crown before he died.

Question: What nationality is Marie Of Blois, Duchess Of Anjou's husband?
Answer: France