Alonso de Ercilla y Zúñiga was born on August 7, 1533 and died on November 29, 1595. Alonso de Ercilla y Zúñiga would have been 62 years old at the time of death or 478 years old today.
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Gaspar de Guzmán y Pimentel was born on January 6, 1587 and died on July 22, 1645. This would have been 58 years old at the time of death or 423 years old today.