Here are a few possibilities, depending on the intended word:
* "Regnots" could be a misspelling of "regnums," which is the plural of "regnum," meaning "kingdom" in Latin. In this case, it would be pronounced "REG-numz."
* "Reignots" could be a misspelling of "reigns," meaning "periods of rule." In this case, it would be pronounced "raynz."
* It's possible that "reignots" is a completely made-up word, in which case there's no correct pronunciation.
If you provide more context about where you encountered this word, I might be able to give you a more accurate answer.
