For Cieszynski there are 26 on Yasni with different names.
Among the most common last names on Yasni Cieszynski is on position 4501.
The ending "ski" in the name indicated as I know, a noble lineage back to (in German as "of"). At the Czech border, there is a Polish city called Cieszyn (Polish) and Teschen (Czech side).
(Sent from: M)