Meet the New Yorker tracing the 300-year history of the Twersky rabbinical dynasty, from Chernobyl to the Bronx

By day, Yitzchak Meyer Twersky is an IT specialist for a healthcare company who works out of his home in the Kew Gardens Hills section of Queens.

But in his free time, Twersky, 59, who is known as Yitz, has become the world’s…