Not sure of what your asking Elaine?
What was the name of the Surdam who married into the family or that gave the first branch that you are aware of? What part of Canada? We are good swimmers ya know (joking)!
I might be able to help you crack it? I'm in the States last name Surdam! I just traced my own lineage to Peter, garentee we are related! Our Forefathers settled NY and were considered Pioneers, our original name was changed many times because our Family had a fleet of ships that sunk the Spanish Armada in the Neatherlands. Spain had a bounty on our heads! Fought in the American Revolution, and some died in Rebel Camps durring the Civil War. The Surdam name is rich in history, they should know their past!