What is "zielinski"

Zieliński (feminine: Zielińska, plural Zielińscy) is the eighth most common surname in Poland (91,522 people in 2009), and one of the largest worldwide. In Poland, the name is on books as having existed since at least the 15th century. Without diacritical marks, the name is spelled Zielinski.

The Russianized form is Zelinsky.