Reading anyone's bloodline for supernatural is something that is unique in its practice and can evolve based on what in your bloodline presents during a reading. There are likely many traces of supernatural origin within you, but it is the presence of the supernatural that reveals itself during a reading which makes itself known. In my own personal work I have read someone over a course of 5 years and had the same results (largely), but then had anomalies that appear sometimes and not others, and it is attributed to the activation (or dormancy) of that bloodline tie. The presence of supernatural blood in others is something we have devoted a lot of time and research with, and it is one of the most intriguing and exciting paths to explore. It's obvious the scientific world continues to just call "new" markers they find as new "humans" and they don't give any consideration to any other type of biped, human being. Even though it's historically proven there are documented Giants, Dwarves, Vampires, Elves, etc. So in our scope of reading the bloodline of others in a supernatural capacity, we have to rely on what is making itself known, and or omitted, through series of readings.