Complex sentence: In turn, after Yusif Vazirov's father died and he himself was desperately ill with typhoid in 1906, the brothers came to his rescue, Vazirov promised himself that if he ever became a writer that he would adopt the name of their village in gratitude.
Split into simpler sentences: In turn, after he died and Yusif himself fell desperately ill with typhoid in 1906, the brothers came to his rescue. That's when Vazirov made a vow that if he ever became a writer that he would adopt the name of their village in gratitude.