He title - 'A Dog Named Duke ', refers to a unique or you can say a dog
who is 'GOD GIFTED ', who is gifted with all the things that a man
has. Besides being a dog he proved to be of a great help to his master. I
mean commonly we people see many dogs serving their masters but they
just do the tasks like protecting the house. But the Duke helped his
master in such a way that he was able to make his master standing on his
feet again which proves to be a very difficult for even we people.
So,he proved really to be 'A Dog Named Duke ' and not just 'Duke '.