 Ivan Alexander ( Bulgarian : Иван Александър , transliterated Ivan Aleksandǎr ; pronounced [ iˈvan alɛkˈsandər ] ; original spelling : ІѠАНЪ АЛЄѮАНдРЪ ) , also sometimes Anglicized as John Alexander , ruled as Emperor ( Tsar ) of Bulgaria from 1331 to 1371 , during the Second Bulgarian Empire . The date of his birth is unknown . He died on 17 February 1371 .
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Ivan Alexander was the son of Ivan Sratsimir and Anna-Sophia, daughter of Michael IX Palaiologos , co-emperor of the Byzantine Empire . He was born in 1331, and was raised in Constantinople