Can you pin this information down a bit -- do you have a date of immigration? Do you know where your Mc/MacPHERSONs came from in Scotland? When they might have been in ND? Where they ended up in Alberta?
Even an approximate *when* and *where* makes it possible to do some lookups which might help you out a lot.
Also, names of spouses and children help to sort out the families one from another.
All the best,