Eleanor of Aragon ( 20 January 1358 - 13 August 1382 ) was a daughter of King Peter IV of Aragon and became queen of Castile by marrying 1375 King John I of Castile .
Eleanor of Aragon ( 20 January 1358 -- 13 August 1382 ) was a daughter of King Peter IV of Aragon and his wife Eleanor of Sicily . 
 On 18 June 1375 , at Soria , she became queen of Castile by marrying King John I of Castile .