Complex sentence: In 1892, Leontovych began his studies at the theological seminary in Kamianets-Podilskyi, which both his father and grandfather attended, and where his younger brother Oleksandr was enrolled as well, graduating two years after Mykola.
Split into simpler sentences: In 1892, Leontovych began his studies at the theological seminary in Kamianets-Podilskyi, which both his father and grandfather had attended. His younger brother Oleksandr was enrolled as well, graduating two years after Mykola.