Just to mention it, but I'm a resident from the Kingdom of Belgium and we have some recognized Polish noble families too, to give an example:
* the mother of our Queen was Anna Maria Komorowska, Countess d'Udekem d'Acoz.
We also have a real noble family that was recognized into our own nobility:
Swiatopelk-Czetwertynski, this is a family that came to Belgium with their noble letters and applied for admission into the Belgian nobility. In 2007 they were accepted with the title of Prince and Princess.
Ps.: As my fiancée is a linguist, she told me that the suffix -ski mostly refers to people from the nobility, as Poland was one of the countries with the highest number of noblemen per capita. Exceptions are for people who have a patronyme: Markowski, Janowski, ... But note that some of these surnames are used by noble families! An example is the family 'Jakubowski', which is a family with the title of baron.