Guitier, Count of Rethel
Guitier( Ithier) of Rethel( died 1171), son of Odo of Vitry and Matilda, Countess of Rethel,( sister to Baldwin II, King of Jerusalem).
Count of Rethel, succeeding his mother.
[ His father is named as count but it is not clear that he ever served.]
Châtelain de Vitry.
In March 1129, Guitier travelled to the Holy Land although it is not clear if he participated in the Crusade of that year.
Guitier married Beatrix of Namur, daughter of Godfrey I, Count of Namur, and Erminside.
Guitier and Beatrix had eleven children:
Upon his death, he was succeeded as Count of Rethel by his son Manasses.
Hugh IV, Count of Rethel
Hugh IV, Count of Rethel( 1244–1285) was a son of Manasses V and his wife, Isabelle of Écry.
In 1272, he succeeded his father as Count of Rethel.
Hugues IV was married to: With Isabelle, he had a daughter, Jeanne, Countess of Rethel, who succeeded him.
In 1290, Jeanne married Louis I, Count of Flanders.
Henriette of Cleves
Henriette of Cleves, also known as Henriette de La Marck( 31 October 1542 – 24 June 1601) was a French courtier and noble, heir of the Cleves- Nevers family.
She became the" suo jure" 4th Duchess of Nevers and the" suo jure" Countess of Rethel, upon the childless death of her brother, James of Cleves, Duke of Nevers and Count of Rethel, in 1564.
She was the spouse of Louis I Gonzaga, Duke of Nevers, 1st Duke of Rethel, and Prince of Mantua and Duchess of Rethel and Princess of Mantua by marriage.
Odo of Vitry
Odo of Vitry (Eudes) (died 1158) was a French nobleman.
Count of Rethel and Châtelain de Vitry.
His parenthood is unclear.
It is sometimes stated that he was a son of André, castellan of Vitré and of Agnès de Mortain, but this appears to be based on a confusion between Vitré in Brittany and Vitry in Champagne.
On the death of his brother-in-law, Gervase, he received the county of Rethel.
Odo was married to Matilda (d. 1151), the eldest daughter of Hugh I, Count of Rethel.
They had at least four children:
From 1124 until his wife's death in 1151, he ruled Rethel jointly with her.
After her death, he ruled alone.
Odo died in 1158, and was succeeded by his son Guitier.
Joan, Countess of Rethel
Joan of Rethel( died 1328) was Countess of Rethel between 1285 and 1328.
She was the daughter of Hugh IV, Count of Rethel and his third wife Isabelle of Grandpré.
She succeeded her father as Countess of Rethel in 1285.
Joan married in 1290 with Louis I, Count of Nevers, son of Robert III, Count of Flanders.
They had two children:
Louis I, Count of Nevers
Louis I( 1272 – 22 July 1322) was" suo jure" Count of Nevers and" jure uxoris" Count of Rethel.
Louis was a son of Robert III, Count of Flanders, and Yolande, Countess of Nevers.
He succeeded his parents as Count of Nevers.
In December 1290, he married Joan, Countess of Rethel, and thus became her co-ruler in the County of Rethel.
They had two children:
He died in Paris shortly before his father and thus never succeeded his father as Count of Flanders.
Marie d'Albret, Countess of Rethel
Marie d' Albret, Countess of Rethel, Countess of Nevers( 25 March 1491 – 27 October 1549) was the suo jure Countess of Rethel, a title which she inherited at the age of nine upon the death of her mother, Charlotte of Nevers, Sovereign Countess of Rethel, on 23 August 1500.
She was the wife of Charles II of Cleves, Count of Nevers.
Matilda, Countess of Rethel
Matilda, Countess of Rethel (1091 in Rethel – 1151) was Sovereign countess of Rethel from 1124 until 1151.
She was a daughter of Count Hugh I and Melisende of Crécy.
In 1124, she succeeded her brother Gervais as Countess of Rethel.
She ruled jointly with her husband, Odo of Vitry.
Matilda and Odo had a son:
Walter, Count of Rethel
Walter, Count of Rethel( d. 1262 was a French nobleman.
He was a younger son of Count Hugh II of Rethel and his wife, Felicitas of Broyes.
In 1251, he succeeded his brother John as the ruling count of Rethel.
No marriage or children are known.
Walter died in 1262, and was succeeded by his youngest brother, Manasses V.
Manasses IV, Count of Rethel
Manasses IV, Count of Rethel( died 1199) was a son of Guitier of Rethel and Beatrice of Namur.
He succeeded his father as Count of Rethel in 1171.
Manasses IV was married to Matilda of Upper Lorraine and was the father of Hugh II.

Question: Which country Matilda, Countess Of Rethel's husband is from?
Answer: French