Numerology is the study of the intuitive, occult, and divine significance and/or power attributed to numbers. Pythagoras and others thought in ancient times that mathematical notions and ideas were easier to use than mental ones because the numbers were real. St. Augustine of Hippo (A.D. 354–430) wrote, “Numbers are the Universal language offered by the deity to humans as confirmation of the truth.” Similar to Pythagoras, he too believed that everything had numerical relationships, and it was up to the mind to seek and investigate the secrets of these relationships or have them revealed by divine grace. However, that does not mean that Pythagoras coined himself the system one calls numerology. Pythagoras only paved the way to the observation of numbers as archetypes rather than mere numerals.
Even though there is the long history of numerological ideas, the word “numerology” in not recorded in English before c.1907. (Wikipedia)
In 1972, Dr. Juno Jordan, changed numerology further and helped it to become the system known currently under the title “Pythagorean,” although Pythagoras himself had nothing to do with the system. Dr. Jordan’s work The Romance in Your Name was the first to provide a fairly comprehensive system for identifying key numerological influences in one’s name and birth date and remains a seminal interpretive guide for practitioners today. The study of numerology continued with the ‘numerologists’ Lynn Buess (1978), Mark Gruner (1979), Kathleen Roquemore (1985), and Florence Campbell (1983) and others that expanded it through the use of numerology for assessing major aspects of personality and cyclical patterns in life.