The correct spelling of the famous French astrologer and physician's name is Nostradamus (nɑːstrəˈdæməs). The first syllable (nɑː) is pronounced with an open "a" sound, and the "r" is silent. The second syllable (strə) has a stressed "a" sound and the final "m" is pronounced. The third syllable (dæməs) has a short "a" sound followed by a pronounced "m" and a silent "us". Despite the word's popularity, it is often misspelled as Nostradomus or Nostradamous.