The Enneagram of personality is a new concept to me, I came across it,  as we do all these things now,  on the internet, I guess it is similar to Carl Jung’s archetypes psychologist. Carl Gustav Jung; 26 July 1875 to 6 June 1961 (aged 85) was  a Swiss psychiatrist and psychoanalyst who founded analytical psychology. Jung’s work was influential in the fields of psychiatry, he was a true great of psychology.

The Enneagram of Personality, or simply the Enneagram (from the Greek words ἐννέα [ennéa, meaning “nine”] and γράμμα [grámma, meaning something “written” or “drawn”, is a model of the human psyche which is principally understood and taught as a typology of nine interconnected personality types. Although the origins and history of many of the ideas and theories associated with the Enneagram of Personality are a matter of dispute, contemporary Enneagram claims are principally derived from the teachings of Oscar Ichazo and Claudio Naranjo. Naranjo’s theories were partly influenced by some earlier teachings of George Gurdjieff. As a typology the Enneagram defines nine personality types (sometimes called “enneatypes”), which are represented by the points of a geometric figure called an enneagram, which indicate connections between the types. There are different schools of thought among Enneagram teachers, therefore their ideas are not always in agreement.

I found a reference to it in Wikipedia https://en.wikipedia.org/wiki/Enneagram_of_Personality