The Kingdom of Castile; Spanish: Reino de Castilla, Latin: Regnum Castellae) was one of the medieval kingdoms of the Iberian Peninsula. It emerged as a political autonomous entity in the 9th century. It was called County of Castile and was held in vassalage from the Kingdom of León. Its name comes from the host of castles constructed in the region. It was one of the kingdoms that founded the Crown of Castile, and the Kingdom of Spain.

01. Ferdinand I "The Great", King of Leon and Castile ^[1] was born abt. 1005.  He was made Count of Castile in 1028 and recognized as Emperor of Spain in 1056.   He married Sancha of Leon, the sister of Bermudo III, King of León.  Ferdinand defeated Bermudo in battle, acquiring León through Sancha's right of succession. He began the period of reconquest of Spain from the Moors. He died on June 24, 1065, dressed in a monk's habit lying on a bier covered with ashes before the altar of St. Isidore Church in Leon, having laid aside his crown and royal mantle. 

02. Alfonso VI, King of Castile ^[1] son of Ferdinand was born in 1030 in Castile, Spain.  He was king of Leon, 1065-1109, and of Castile, 1072-1109. He married Constance of Burgundy.  He captured Toledo, ancient capital of the Visigoths, from the Moors, 1085. This expanded his rule to the Tagus River and the center of the Iberian peninsula. He welcomed the Cluniac monks and pressed for adoption of the Roman liturgy instead of the Mozarabic. His daughters married French nobles, resulting in establishment of the Burgundian dynasties in Castile, Leon and Portugal. He died on June 30, 1109.

03. Urracca, Queen of Castile ^[1] daughter Alfonso was born in 1082 in Castile, Spain.  She was Queen of León, Castile, and Galicia, and claimed the imperial title as "suo jure Empress of All the Spains" from 1109 until her death in childbirth, as well as "Empress of All Galicia".  She married Raymond, Count of Burgundy in 1095.  Following the death of Raymond of Burgundy, her husband, she ruled the medieval Spanish kingdom of Castile until 1125.  She died on March 6, 1126.

04. Alfonso VII King of Castile and Spain ^[1] son of Raymond and Urracca was born in 1105 in Castile, Spain. He was known as "The Emperor" via honor given Leon as representative of Visigoth kings who represented Roman Emperor.  He was crowned Emperor in 1135. He married (1) Berenguela of Barcelona.   I descend from 2 of their sons, Ferdinand II (1137-1188) and Sancho III (1134-1158).  Alfonso married (2) Richenza of Poland. I descend from their daughter Sancha of Castile (1155-1208) who married Alfonso II, King of Aragon. He died on August 21, 1157 on returning from unsuccessful campaign against the Almohades, in the Pass of Muradel in the Sierra Morena, en route to Toledo.

05a. Ferdinand II, King of Spain ^[1] son of Alfonso and Berenguela was born abt. 1137 in Castile, Spain.  He married Uracca of Portugal in 1160 in Leon, Spain.  Ferdinand was noted both for his intermittent wars with Castile and Portugal and for his reorganization, about 1170, of the military Order of Saint James of the Sword (Santiago de la Espada) to participate in the campaign to drive the Moors from Spain. He reigned for 30 years from 1157 to his death on January 21, 1188 in Leon, Spain.

06. Alfonso IX, King of Leon and Castile ^[1] son of Ferdinand and Uracca was born on August 15, 1171 in Leon, Spain.  He married Beringaria in October, 1197 who was the daughter of Alfonso VIII (1155-1214) - see #6 below on Sancho's line.  The marriage between Beringaria and Alfonso was disolved by order of the pope (Alfonso IX and Alfonso VIII were first cousins), but their children were proclaimed legitimate. He reigned from 1157 to his death on September 23, 1230 in Castile, Spain.

07. Ferdinand III "Saint" King of Castile ^[1] son of Alfonso and Beringaria was born on August 5, 1199 in Castile, Spain.  He married Joanna De Dammartin in 1237.  He died on May 30, 1252 in Savilla, Spain. Ferdinand was canonized in 1671 for his orthodoxy and his crusading against the Moors. 

08. Eleanor, Princess of Castile/Queen of England ^[1] daughter of Fernando and Joanna was born in 1240 in Burgos, Spain.  She married King Edward I on October 18, 1254 in Burgos, Spain.  She died on November 28, 1290 in Nottinghamshire, England.  I descend from 2 of their daughters:  Princess Joan of Acre (1272-1307) who married Gilbert DeClare (1243-1295) and Elizabeth Plantagenet (1282-1316) who married Humphrey VIII De Bohun (c1276-1321).