What kind of Scandinavian country is Peter Ostrum from?

Question:

What kind of Scandinavian country is Peter Ostrum from?

When I first found out that the little boy who played Charlie Bucket in Willy Wonka and the Chocolate Factory had the last name Ostrum, I almost knew instantly that it's Scandinavian-so I thought Swedish or Norwegian? Then that thought was confirmed when I found out he has a son named Leif! and a daughter named Helenka.

Best Answer - Chosen by Asker: Definitely Swedish, literally translates as "island-stream".