Biography of Alfonso IX King Leon 1171-1230

Paternal Family Tree: Ivrea

Before 15th August 1171 [his father] Ferdinand II King Leon [aged 34] and [his mother] Urraca Burgundy Queen Consort Leon [aged 23] were married. She by marriage Queen Consort Leon. She the daughter of [his grandfather] Afonso "Conqueror Founder Great" I King Portugal [aged 62] and [his grandmother] Malfada Savoy Queen Consort Portugal. He the son of Alfonso VII King Castile VII King Leon and Berenguela Barcelona Queen Consort Castile and Leon. They were half second cousins.

On 15th August 1171 Alfonso IX King Leon was born to [his father] Ferdinand II King Leon [aged 34] and [his mother] Urraca Burgundy Queen Consort Leon [aged 23]. Coefficient of inbreeding 2.00%.

On 22nd January 1188 [his father] Ferdinand II King Leon [aged 51] died. His son Alfonso [aged 16] succeeded IX King Leon.

In 1191 Alfonso IX King Leon [aged 19] and Theresa of Portugal Queen Consort Leon [aged 15] were married. She by marriage Queen Consort Leon. She the daughter of Sancho "Populator" I King Portugal [aged 36] and Dulce Barcelona Queen Consort Portugal. He the son of Ferdinand II King Leon and Urraca Burgundy Queen Consort Leon [aged 43]. They were first cousins.

In 1191 [his daughter] Sancha Ivrea Queen Consort Castile was born to Alfonso IX King Leon [aged 19] and [his wife] Theresa of Portugal Queen Consort Leon [aged 15]. Coefficient of inbreeding 8.34%. She married 1216 her second cousin Henry I King Castile, son of Alfonso VIII King Castile and Eleanor Plantagenet Queen Consort Castile.

Around 1192 [his son] Ferdinand Ivrea was born to Alfonso IX King Leon [aged 20] and [his wife] Theresa of Portugal Queen Consort Leon [aged 16]. Coefficient of inbreeding 8.34%.

Around 1193 [his daughter] Dulce Ivrea was born to Alfonso IX King Leon [aged 21] and [his wife] Theresa of Portugal Queen Consort Leon [aged 17]. Coefficient of inbreeding 8.34%.

In 1197 Alfonso IX King Leon [aged 25] and Berengaria Ivrea I Queen Castile [aged 18] were married. She by marriage Queen Consort Leon. She the daughter of Alfonso VIII King Castile [aged 41] and Eleanor Plantagenet Queen Consort Castile [aged 35]. He the son of Ferdinand II King Leon and Urraca Burgundy Queen Consort Leon [aged 49]. They were first cousin once removed. She a granddaughter of King Henry "Curtmantle" II of England.

In 1199 [his son] Ferdinand III King Castile III King Leon was born to Alfonso IX King Leon [aged 27] and [his wife] Berengaria Ivrea I Queen Castile [aged 20]. He a great grandson of King Henry "Curtmantle" II of England. Coefficient of inbreeding 3.56%. He married (1) 30th November 1219 his fourth cousin Elisabeth Hohenstaufen Queen Consort Castile Queen Consort Leon and had issue (2) October 1237 his second cousin once removed Joan Dammartin Queen Consort Castile and Leon, daughter of Simon Dammartin and Marie Montgomery Countess Ponthieu, and had issue.

Chronicle of Geoffrey le Baker of Swinbroke

Baker was a secular clerk from Swinbroke, now Swinbrook, an Oxfordshire village two miles east of Burford. His Chronicle describes the events of the period 1303-1356: Gaveston, Bannockburn, Boroughbridge, the murder of King Edward II, the Scottish Wars, Sluys, Crécy, the Black Death, Winchelsea and Poitiers. To quote Herbert Bruce 'it possesses a vigorous and characteristic style, and its value for particular events between 1303 and 1356 has been recognised by its editor and by subsequent writers'. The book provides remarkable detail about the events it describes. Baker's text has been augmented with hundreds of notes, including extracts from other contemporary chronicles, such as the Annales Londonienses, Annales Paulini, Murimuth, Lanercost, Avesbury, Guisborough and Froissart to enrich the reader's understanding. The translation takes as its source the 'Chronicon Galfridi le Baker de Swynebroke' published in 1889, edited by Edward Maunde Thompson.

Available at Amazon in eBook and Paperback format.

23rd May 1200 King Louis VIII of France [aged 12] and [his sister-in-law] Blanche Ivrea Queen Consort France [aged 12] were married. She the daughter of [his father-in-law] Alfonso VIII King Castile [aged 44] and [his mother-in-law] Eleanor Plantagenet Queen Consort Castile [aged 38]. He the son of King Philip II of France [aged 34] and Isabelle Flanders Queen Consort France. They were third cousins. He a great x 3 grandson of King William "Conqueror" I of England. She a granddaughter of King Henry "Curtmantle" II of England.

In 1204 [his daughter] Beregaria Ivrea was born to Alfonso IX King Leon [aged 32] and [his wife] Berengaria Ivrea I Queen Castile [aged 25]. She a great granddaughter of King Henry "Curtmantle" II of England. Coefficient of inbreeding 3.56%. She married John de Brienne I King Jerusalem, son of Erard Brienne II Count Brienne and Agnès Montfaucon Countess Brienne, and had issue.

In 1206 [his brother-in-law] Alfonso "Fat" II King Portugal [aged 20] and [his sister-in-law] Urraca Ivrea Queen Consort Portugal [aged 18] were married. She the daughter of [his father-in-law] Alfonso VIII King Castile [aged 50] and [his mother-in-law] Eleanor Plantagenet Queen Consort Castile [aged 44]. He the son of [his uncle] Sancho "Populator" I King Portugal [aged 51] and Dulce Barcelona Queen Consort Portugal. They were second cousin once removed. She a granddaughter of King Henry "Curtmantle" II of England.

In 1211 [his mother] Urraca Burgundy Queen Consort Leon [aged 63] died.

On 26th March 1211 [his uncle] Sancho "Populator" I King Portugal [aged 56] died. His son [his brother-in-law] Alfonso [aged 25] succeeded II King Portugal. [his sister-in-law] Urraca Ivrea Queen Consort Portugal [aged 23] by marriage Queen Consort Portugal.

In 1214 King Valdemar II of Denmark [aged 43] and [his sister-in-law] Berengaria Burgundy Queen Consort Denmark [aged 16] were married. She by marriage Queen Consort Denmark. The difference in their ages was 27 years. She the daughter of [his uncle] Sancho "Populator" I King Portugal and Dulce Barcelona Queen Consort Portugal. He the son of Valdemar "Great" I King of Denmark and Sophia of Minsk.

In 1214 [his son] Ferdinand Ivrea [aged 22] died.

Before 1215 [his son-in-law] Lope Díaz II de Haro [aged 44] and [his illegitimate daughter] Urraca Alfonso de León were married. She the illegitmate daughter of Alfonso IX King Leon [aged 43].

In 1215 [his future son-in-law] Henry I King Castile [aged 10] and [his sister-in-law] Mafalda Burgundy Queen Consort Castile [aged 19] were married. She by marriage Queen Consort Castile. She the daughter of [his uncle] Sancho "Populator" I King Portugal and Dulce Barcelona Queen Consort Portugal. He the son of [his father-in-law] Alfonso VIII King Castile and [his mother-in-law] Eleanor Plantagenet Queen Consort Castile. They were second cousin once removed. He a grandson of King Henry "Curtmantle" II of England.

In 1216 [his son-in-law] Henry I King Castile [aged 11] and Sancha Ivrea Queen Consort Castile [aged 25] were married. She by marriage Queen Consort Castile. She the daughter of Alfonso IX King Leon [aged 44] and Theresa of Portugal Queen Consort Leon [aged 40]. He the son of Alfonso VIII King Castile and Eleanor Plantagenet Queen Consort Castile. They were second cousins. He a grandson of King Henry "Curtmantle" II of England.

On 6th June 1217 [his son-in-law] Henry I King Castile [aged 13] was killed by a tile falling of a roof. He was buried at Abbey of Santa Maria la Real de Huelgas [Map]. His sister [his wife] Berengaria [aged 38] succeeded I Queen Castile.

The Deeds of the Dukes of Normandy

The Gesta Normannorum Ducum [The Deeds of the Dukes of Normandy] is a landmark medieval chronicle tracing the rise and fall of the Norman dynasty from its early roots through the pivotal events surrounding the Norman Conquest of England. Originally penned in Latin by the monk William of Jumièges shortly before 1060 and later expanded at the behest of William the Conqueror, the work chronicles the deeds, politics, battles, and leadership of the Norman dukes, especially William’s own claim to the English throne. The narrative combines earlier historical sources with firsthand information and oral testimony to present an authoritative account of Normandy’s transformation from a Viking settlement into one of medieval Europe’s most powerful realms. William’s history emphasizes the legitimacy, military prowess, and governance of the Norman line, framing their expansion, including the conquest of England, as both divinely sanctioned and noble in purpose. Later chroniclers such as Orderic Vitalis and Robert of Torigni continued the history, extending the coverage into the 12th century, providing broader context on ducal rule and its impact. Today this classic work remains a foundational source for understanding Norman identity, medieval statesmanship, and the historical forces that reshaped England and Western Europe between 800AD and 1100AD.

Available at Amazon in eBook and Paperback format.

On 31st August 1217 [his wife] Berengaria Ivrea I Queen Castile [aged 38] abdicated I King Castile. Her son Ferdinand [aged 18] succeeded III King Castile.

On 30th November 1219 Ferdinand III King Castile III King Leon [aged 20] and Elisabeth Hohenstaufen Queen Consort Castile Queen Consort Leon [aged 14] were married in Burgos [Map]. She by marriage Queen Consort Castile, Queen Consort Leon. She the daughter of Philip King Germany. He the son of Alfonso IX King Leon [aged 48] and Berengaria Ivrea I Queen Castile [aged 40]. They were fourth cousins. He a great grandson of King Henry "Curtmantle" II of England.

On 3rd November 1220 [his sister-in-law] Urraca Ivrea Queen Consort Portugal [aged 33] died.

On 27th March 1221 [his sister-in-law] Berengaria Burgundy Queen Consort Denmark [aged 23] died.

On 25th March 1223 [his brother-in-law] Alfonso "Fat" II King Portugal [aged 37] died at Coimbra. His son Sancho [aged 13] succeeded II King Portugal.

On 14th July 1223 King Philip II of France [aged 57] died. His son Louis [aged 35] succeeded VIII King France: Capet. [his sister-in-law] Blanche Ivrea Queen Consort France [aged 35] by marriage Queen Consort of France.

On 24th September 1230 Alfonso IX King Leon [aged 59] died. His son Ferdinand [aged 31] succeeded III King Leon.

On 8th November 1246 [his former wife] Berengaria Ivrea I Queen Castile [aged 67] died.

On 18th June 1250 [his former wife] Theresa of Portugal Queen Consort Leon [aged 74] died.

[his daughter] Maria Ivrea was born to Alfonso IX King Leon and Theresa of Portugal Queen Consort Leon. Coefficient of inbreeding 8.34%.

[his illegitimate daughter] Urraca Alfonso de León was born illegitimately to Alfonso IX King Leon.