I have talked to numerologists and palm readers, and I even know a decent amount about that myself, as head of my college's magic, mythology, and mysticism club. So, in my informed opinion, I would say no. Palm reading, for example, is based on making inferences about you/your lifestyle based on marks on/the condition of your hands, as well as normal social cues. So, they wouldn't know more than anyone else in regards to an alternate personality that does nothing physically with your body.
Numerology is not nearly as accurate as palm reading, and they wouldn't know either.