Alfonso IX (15 August 1171 — 24 September 1230) nicknamed the Warrior King (Spanish: el Rey Guerrero) was King of León and Galicia from in 1188 until his death in 1230. During his reign, León became more powerful and modern. He founded the University of Salamanca in 1212.

Alfonso VI ( c. 1040/1041 – 1 July 1109), nicknamed the Brave (El Bravo) or the Valiant, was king of León (1065–1109), Galicia (1071–1109), and Castile (1072–1109). 13th century miniature of Alfonso VI from the Tumbo A codex at the Cathedral of Santiago de Compostela.

Alfonso IX, King of León and Galicia (1188-1230), was a fairly successful ruler in the northern part of Iberia, managing to stay on the throne for 42 years. However, the North African scholar Ibn Khaldun noted that he was called Baboso or the Slobberer because he would foam at the mouth whenever he got upset.

Alfonso VI, known as Alfonso the Brave, (born before June 1040—died 1109, Toledo, Castile), King of León (1065–70) and of Castile and León (1072–1109). He inherited León from his father, Ferdinand I, and warred with his envious brother Sancho II.