Olaus Gunderson is the brother of Bjorn Gunderson and a third class passenger on Titanic. He is Swedish and most likely a friend of Sven and Olaf, because they ask where Sven is, when Jack Dawson and Fabrizio De Rossi become their cabin mates instead due to Jack winning the tickets in a poker game from Sven and Olaf although it is unknown if Jack told them.
He is seen at the party, and later during the sinking. He and Bjorn are seen avoiding a lifeboat which nearly hits them.
He was played by Swedish actor Anders Falk.