ALPHONSO IX. (1188--1230) of Leon, first cousin of Alphonso 
VIII. of Castile, and numbered next to him as being a junior 
member of the family (see the article 
Spain for the division 
of the kingdom and the relationship), is said by Ibn Khaldun 
to have been called the "Baboso" or Slobberer, because he 
was subject to fits of rage during which he foamed at the 
mouth.  Though he took a part in the work of the reconquest, 
this king is chiefly remembered by the difficulties into which 
his successive marriages led him with the pope.  He was first 
married to his cousin Teresa of Portugal, who bore him two 
daughters, and a son who died young.  The marriage was declared 
null by the pope, to whom Alphonso paid no attention till he 
was presumably tired of his wife.  It cannot have been his 
conscience which constrained him to leave Teresa, for his next 
step was to marry Berengaria of Castile, who was his second 
cousin.  For this act of contumacy the king and kingdom were 
placed under interdict.  The pope was, however, compelled to 
modify his measures by the threat that if the people could 
not obtain the services of religion they would not support the 
clergy, and that heresy would spread.  The king was left under 
interdict personally, but to that he showed himself indifferent, 
and he had the support of his clergy.  Berengaria left him 
after the birth of five children, and the king then returned 
to Teresa, to whose daughters he left his kingdom by will. 
Initial text from 1911 encyclopedia -- Please update as needed