Question

Why most of the Polish surnames end with '...ski' ?​

Answer 1

Names derived from places usually ended in -ski, meaning "of", and were reserved for nobility. In the 13th century, however, it became fashionable to adopt a -ski name, making it one of the most identifiable traits of Polish last names.

Answer 2

Explanation:

The suffix, -ski (feminine: -ska), has been restricted to the nobility in eastern Europe and some parts of central Europe since the High Middle Ages. It was the equivalent to nobiliary particles appearing in the names of nobility, such as in the Germanic von or zu.