Odo, Count of Penthièvre
Odo of Rennes (Medieval Breton: "Eudon Pentevr", Modern Breton: "Eozen Penteur", Latin: "
Eudo", French: "Eudes/Éon de Penthièvre")
(999–1079), Count of Penthièvre, was the youngest of the three sons of Duke Geoffrey I of Brittany and Hawise of Normandy, daughter of Richard I of Normandy.
Eozen married Agnes of Cornouaille (Orguen Kernev), the daughter of Alan Canhiart, Count of Cornouaille and sister of Hoel II, Duke of Brittany who was married in 1066 to Eozen's niece Hawise, Duchess of Brittany.
Isabella of Brittany
Isabella of Brittany( 1411 – c. 1444) was a daughter of John V, Duke of Brittany, and his wife, Joan of Valois.
Isabella was a member of the House of Dreux.
Gourmaëlon
Gourmaëlon or Wrmaelon( died 913/ 4), was the Count of Cornouaille and" de facto" ruler of Brittany from 907 – c. 914.
As ruler of Brittany he was considered" Prince de Bretagne" in some chronicles and histories.
His actual history is among the least well documented of the early medieval rulers of Brittany.
His reputed time of rule coincides with a dramatic increase in Viking invasions that ultimately led up to the Viking Occupation of Brittany that began after his death.
He is believed to have been named Count of Cornouaille by Alan I, King of Brittany near the end of his reign in 907.
After Alan I's death in 907 he disputed the right of Alan's heirs to rule Brittany and fought for the control of the kingdom, albeit without claiming the title king.
His life and activities are sparsely recorded in historical documents save for several donations to the Breton churches of the day.
In a donation to the monastery of Plélan in 910 he is identified as ruler of Brittany.
At Redon in 913 he is identified as" Count Gourmaelon, the Breton monarch."
He is understood to have died in 913( or 914) in a battle with invading Vikings.
No subsequent ruler of Brittany is recorded in histories or chronicles of the period until the return of Alan II, Duke of Brittany, known as Alan Barbetorte, from England c. 937–938.
Marie of Brittany, Countess of Saint-Pol
Marie of Brittany( 1268–1339) was the daughter of John II, Duke of Brittany, and Beatrice of England.
She is also known as Marie de Dreux.
Eleanor, Fair Maid of Brittany
Eleanor Fair Maid of Brittany( c. 1184 – 10 August 1241), also known as Damsel of Brittany, Pearl of Brittany, or Beauty of Brittany, was the eldest daughter of Geoffrey II, Duke of Brittany, the fourth son of King Henry II of England, and Constance, Duchess of Brittany.
After the presumed death in 1203 of her imprisoned younger brother, Arthur, she was heiress to vast lands including England, Anjou, and Aquitaine as well as Brittany, realms where the Salic Law barring the accession of females did not apply.
Her uncle John, King of England was the fifth son of Henry II, and Eleanor inherited Arthur's claim to the throne as child of John's elder brother Geoffrey.
Thus she posed a potential threat to John, and following his death in 1216, equally to her cousin, Henry III of England.
She was imprisoned from 1202, and thus became the longest- imprisoned member of an English royal family.
As a prisoner she was also unable to press her claim to the Duchy of Brittany as her mother's heiress.
Like Empress Matilda and Elizabeth of York, her claim to the English throne gained little support from the barons, due to the expectation that the monarch should be male, despite legal provision for a female monarch.
Some historians have commented that her imprisonment was" the most unjustifiable act of King John".
Guerech, Duke of Brittany
Guerech of Brittany, was Count of Nantes and Duke of Brittany from 981 to 988.
Hoël I, Duke of Brittany
Hoël I of Brittany was an illegitimate son of Alan II and Judith.
He was Count of Nantes and Duke of Brittany from 960 to 981.
Brian of Brittany
Brian of Brittany (c. 1042 – bef. 1086) was a Breton nobleman who fought in the service of William I of England.
A powerful magnate in south-western England
, he was the first post-Conquest earl of Cornwall.
Brian was born in about 1042, a son of Odo, Count of Penthièvre.
Brian joined in the Norman Conquest of England, along with his brothers Alan the Black
(Alain le Noir), and
Alan the Red.
Godwine and Edmund, sons of Harold Godwinson, escaped after the Battle of Hastings to Leinster, where they were guests of Diarmait.
In 1068 and 1069 Diarmait lent them the fleet of Dublin for attempted invasions of England.
At midsummer in 1069 Brian and Alan led a force that defeated a raid by a fleet of 64 ships on the mouth of the River Taw in Devon.
Later in the same year Brian and William fitz Osbern were sent to relieve sieges at Shrewsbury and Exeter by English forces rebelling against Norman lordship.
They were too late to save the former but a sally by the defenders of Exeter drove the English into the path of Brian and William who "punished their audacity with great slaughter".
After defeating Harold's sons, Brian's forces went north to counter the rebellion by Eadric the Wild, while William the Conqueror's army travelled west; the two armies joined and won the Battle of Stafford.
Brian received grants of land in Suffolk and Cornwall, although the first mention of him as Earl of Cornwall was not made until 1140, by his nephew Alan, 1st Earl of Richmond who had been given the same title by King Stephen and may have been trying to improve the legitimacy of his new rank.
Brian's name is often associated with the construction of Launceston Castle.
Brian may have left England soon after the battles of 1069, or perhaps following the rebellion of Ralph de Gaël in 1075.
In any case, his estates became part of the grants made by King William to Robert of Mortain.
Brian may have lived the rest of his life as a semi-invalid in and near Brittany, staying with his wife.
E. A. Freeman however has him holding Kastoria in Thessaly for Bohemond I of Antioch in 1083.
In 1084 he witnessed a charter of his eldest brother Geoffrey Boterel in Brittany and another in Anjou in that year; he may have died before 1086.
It is not clear whether Brian had descendants.
Ridoredh of Vannes
Rivallo IV, Prince of Brittany, Earl of Poher,( died Nov 12, 857), was a son of Saint Salomon, or Salaün, King of Brittany.
He had a son called Alan, Earl of Vannes, Prince of Brittany, who died around 907.
Françoise de Dinan
Françoise de Dinan( 1436- 1499), was a French heiress, courtier and educator.
She was the governess of Anne of Brittany.
She was the daughter and heir of Jacques de Dinan( d. 1444), lord of Beaumanoir and chamberlain at the court of Brittany, and Catherine de Rohan.
Sh was also the heir of her paternal uncle Bertrand de Dinan( d. 1444), Marshall of Bretagne, Lord of Montafilant, Chateaubriant and Huguetières.
She was abducted by and forced to marry Gilles of Brittany, brother of Francis I, Duke of Brittany and Peter II, Duke of Brittany, in 1444.
She was widowed in 1450, when her spouse was imprisoned and died on the instigation of Arthur de Montauban, who wished to marry her.
By the help of Françoise d'Amboise, she married Guy XIV de Laval in 1451.
In 1488, she was appointed governess to Anne of Brittany and her sister Isabelle.
She played an active role on the political marriage arrangements surrounding Anne.
In 1494, she remarried the noble Jean de Proisy.

Question: What nationality is Brian Of Brittany's father?