Dobrowolski, Dobrowolska — from Skępe
from Old Polish adjective dobrowolny — built-up from 2 words: dobra + wola; dobra = good, wola = will, means acting without compulsion, free decision.
[source: 1000 najpopularniejszych nazwisk w Polsce, Publ. Warszawa 2002]
It’s quite common name. In 1990’s there were 19,382 people named Dobrowolski in Poland.
[source: Najpopularniejsze nazwiska w Polsce (20,000 most popular names in Poland in 1990’s]
[Source: These maps were created about 1997 on page moikrewni.pl]
8537 men and 9132 women = 17,669 persons with the name Dobrowolski (-ska) lived in Poland.