Alfonso IX (15 August 1171 – 23 or 24 September 1230) was
king of León and
Galicia from the death of his father
Ferdinand II in 1188 until his own death. According to
Ibn Khaldun (1332–1406), he is said to have been called the
Baboso or
Slobberer because he was subject to fits of rage during which he foamed at the mouth.