Fixed that for you. The prediction made was not as specific as your statement suggests.
Twelve years is a very, very long time. Did anyone at the spiritualist centre know that you were born in Scotland or that you may have been distantly related to the royal family or that you believed you were a reincarnation of a member of the royal family?
Surely after twelve years, at least some people at the centre knew a lot about you.
Firstly, forgive me if I doubt that you can remember a prediction, word for word, made years ago. As RSLancastr mentioned in his post, memory is fickle and changes over time. It is quite possible that what you now remember as being a reading that included a distant family link may have initially been some added flavour to the prediction knowing you were born in Scotland. Not a link through familial relationship, but a link through nationality.
However, as mentioned above, even if the prediction included a family link, it would not be surprising if, after twelve years, many people knew a lot about you.
Which then brings the prediction back to the death of a member of the royal family, which we have already covered as not being all that extraordinary a prediction for a psychic to make. Good luck for being around for one of the few times that a psychic actually managed to score a hit.
I strongly suggest you start another thread on reincarnation (or ask a moderator to split this one). Otherwise this thread will become a mish-mash of multiple beliefs.
Numerous hits after TWELVE YEARS at a spritualist centre?! This is statistically insignificant. How do you think I would do, with no psychic powers whatsoever, if I spent several hours, once a week, for twelve years making predictions? What if a group of JREF posters got together spending several hours, once a week for twelve years making predictions? It would be downright bizarre if we DIDN'T score many hits. Even some real long shots (like the death of a member of a royal family in the coming week).
This, more than anything, tells us that your experiences are nothing out of the ordinary.