Arthur I of England, Count of Anjou, Maine, Duke of Brittany, Duke of Aquitaine, Count of Nantes, and Duke of Normandy.

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On 1201, Constance, Duchess of Brittany would have a full recovery after giving birth to the twins that she had given birth in 1201, she had seen the betrayal by her brother in law and Philip II of France in the Treaty of Le Goulet and urged her son to make a marriage deal with Peter II of Aragon and marry Eleanor of Brittany to Peter II of Aragon to secure an alliance in late 1201 and the other would be to distance himself from the affairs of Angouleme, the Lusignans.

The marriage between Eleanor of Brittany and Peter II of Aragon would have helped secure an alliance between Aragon and Brittany to reclaim England and the rest of the Angevin Empire but her dowry would be his claims to the County of Toulouse which he would never claim anymore afterwards.

Arthur of Brittany would marry Maria of Brabant in 1203 which would annoy his own cousin Otto IV of Holy Roman Empire, but he would not mind it as his cousin had sided with his uncle, John and he had rejected the offer of Philip II to ally with him against his uncle in 1202 which would cause Philip II to be cautious of Arthur and he would continue to be friendly with King John.

His mother’s advice would be fruitful as the Counties of Touraine and Poitiers have defected to Arthur after the death of Eleanor of Aquitaine in 1204.

 

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On 1214 after defeating and deposing his uncle, John in the Battle of Bouvines, Arthur would nominate his second son, Richard as the Duke of Aquitaine and Gascony and ceded Poitou to him and recognized the cession of Evreux, Issoudun, and Vexin to Blanche of Castile in the Treaty of Le Goulet, his sons Henry(1206), Richard(1208), and Geoffrey(1212) and daughters Eleanor(1209), Mary(1211) would follow Arthur and his wife Maria to England, Arthur and Maria of Brabant would have two more children namely, Margaret(1217) and Constance(1221), Richard II of Aquitaine is betrothed to Blanche of France, daughter of Louis VIII and Blanche of Castile.

His mother, Constance of Brittany would feel victorious with her son, Arthur I of Brittany due to him getting the throne of England.

Arthur would also take Normandy, Maine and Aquitaine from King John but he would give Aquitaine and Gascony to his son, Richard in 1214 and allowed his uncle John to retain Ireland until his death in 1216 when it was inherited by his son, Henry in 1216.

Mathew of Paris would credit Constance of Brittany and Peter II of Aragon for their assistance and advice in Arthur I of England taking the throne from John I of England.

Children of Arthur I of England

Henry b. 1206

Richard II of Aquitaine b. 1208

Geoffrey b. 1212

Eleanor b. 1209

Mary b. 1211

Geoffrey b. 1212

Margaret b. 1217

Constance b 1221

 

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On 1201, Eleanor of Brittany would marry Peter II of Aragon ceding Arthur’s claims to the County of Toulouse to Peter II of Aragon.

Both Philip II and John I of England did not like his cession of claims to Toulouse of Arthur as they both have claims in it which is another reason why Philip II would not really support Arthur, knowing that he can betray him anytime.

Eleanor of Brittany would bear three children named Matilda(1203), Eleanor(1206), James(1208), and Sanchia(1212), James would be the successor her husband Peter II.

Eleanor of Brittany would witness her husband being crowned by the pope 1205 as a Catholic Monarch.

Eleanor of Brittany would have suggested to her husband and arranged the betrothals and marriage of her daughters Constance and Eleanor to Henry of Castile and Philip of France, grandson of Philip II, but the betrothal of Constance to Henry ended up being for Ferdinand III of Castile and Leon while Eleanor would end up not marrying Philip due to his death in 1218 and she would end up marrying Ladislaus III of Hungary, the termination of the betrothal and death of Henry of Castile would end the betrothal of Eleanor of Castile to James and resulted in the marriage of James to Berengaria of Leon in 1224, James I of Aragon would arrange the marriage of his sister, Sanchia to Frederick II of HRE in 1224.

Eleanor of Brittany would send Aragonese troops for brother, in the Battle of Bouvines in 1214.

 

[kasumigenx]

Constance, Duchess of Brittany of Brittany d. 1218 m. Geoffrey of England(a) Ranulf de Blondeville(b) Guy of Thouars(c)

1a. Eleanor of Brittany b. 1182/1184 m. Peter II of Aragon(a)

1a1a. Matilda of Aragon b. 1202 m. Ferdinand III of Leon and Castile

1a2a. Eleanor b. 1206 m. Ladislaus III of Hungary

1a3a. James I of Aragon b. 1208 m. Berengaria of Leon

1a4a. Sanchia of Aragon b. 1212 m. Frederick I of Sicily

2a. Matilda of Brittany b. 1185 d. 1189

3a. Arthur I of England b. 1187 d. 1237 m. Maria of Brabant

3a1a. Henry b. 1206

3a2a. Richard II of Aquitaine b. 1208 m. Blanche of France

3a3a. Geoffrey b. 1212

3a4a. Eleanor b. 1209

3a5a. Mary b. 1211

3a6a. Geoffrey b. 1212

3a7a. Margaret b. 1217

3a8a. Constance b 1221

4c. Alix of Brittany b. 1200 m. Alexander II of Scotland

5c. Margaret of Thouars b. 1201 m. Andrew of Vitre

6c. Catherine of Thouars b. 1201 m. Henry of Penthievre

 

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Louis VIII m. Blanche of Castile(a)

1a. Blanche b. 1205 m. Richard II, Duke of Aquitaine

2a. Agnes b. 1207

3a. Philip b. 1209 d. 1218 b. Eleanor of Aragon

4a. Alphonse (b. 1213 and d. 1213), twin of John.

5a. John (b. 1213 d. 1213), twin of Alphonse.

6a. Louis IX b. 1214–

7a. Robert b. 1216-

8a. Philip b. 1218-

9a. John b. 1219–

10a. Alphonse b. 1220–

11a. Philip Dagobert b. 1222 d. 1234

12a. Isabelle b. 1224-

13a. Etienne b. 1225 d. 1227

14a. Charles b. 1226–