Ramiro II of Aragon (died 1157)

Ramiro II, called the Monk, was a member of the House of Jiménez who became King of Aragon in 1134. Although a monk, he was elected by the Aragonese nobility to succeed his childless brother Alfonso the Battler. He then had a daughter, Petronilla, whom he had marry Count Ramon Berenguer IV of Barcelona, unifying Aragon and Barcelona into the Crown of Aragon. He withdrew to a monastery in 1137, leaving authority to Ramon Berenguer but keeping the royal title until his death.