Jakša is the eponymous founder of the Jakšić noble family In 1452, he was sent as a deputy of the Despot to the Republic of Ragusa.
As an Ottoman vassal, Đurađ was forced to send 500 cavalry to participate in the Siege of Constantinople (1453).
Jakša, hearing of this, wanted to return but was warned that if they would not continue, the sultan would destroy the Serbs.
Jakša reached Constantinople, which had been the cradle of Eastern Christianity and culture, serving as the capital of the now destroyed Byzantine Empire.
Janissary Konstantin Mihailović was part of this army; he wrote a memoir in which he mentioned these events.