Where's the Ostrenga surname from?

-I thought it might be portuguese but I am not sure? does anyone know? thanks.It's Polish.



http://genealogy.familyeducation.com/sur鈥?/a>It is Polish. But it is not an uncommon surname here in Brazil, because we have the second biggest Polish population outside of Poland. First is in the USA.
It's Polish
It's not portuguese....
jew