Julie, I suspect you are expecting to crack this problem far too quickly. When I encountered a serious blockage in my wife's Sutherland family tree, it took me three years of intensive research to find a way forward. In your case, I suspect the answer may lie in a local parish record (assuming the record has survived, of course). Bear in mind that people's names are often wrongly spelt, especially if the name is foreign to the person making the record. As well as Sutherland, you could look under Souterland, etc. You also have the option to work in two directions. You can look for Daniel Sutherland in the Dutch parish records. You can also make a list of Scotch Brigade soldiers named Sutherland, who could have been Danie's father. You could look for their names under various spellings. Viewed from this perspective, there is a good chance you will eventually find your man, but expect it to take a long time. If you can find his father's name, it should be possible to trace his family back to medieval times, using the excellent Scottish clan records.
Kind Regards, Michael