To research this, anyone who'd like to help you needs his full name, birth date and parents' names, and also the names of his ex-wife and the name of his other child. Also, where and when did they live? Was it somewhere in Manitoba? When and where were you born? It's definitely not enough to just give us surnames Derksen and Brown (pretty common in Manitoba) and Pryzner. Would love to help you, and have lots of resources to do so, if you provide as much as possible of the above info.