Complex sentence: The growing trade finally resulted in 1861 in an upgrade to "zashtatnyj" (self-governing) town Pavlodar, meaning the "Gift of Paul", in honor of the newly born Prince Pavel Aleksandrovich.
Split into simpler sentences: The growing trade finally resulted in 1861 in an upgrade to "zashtatnyj", a self-governing town. It gained the name Pavlodar, "Gift of Paul", in honor of newly born Prince Pavel Aleksandrovich.