Illeism /ˈɪli.ɪzəm/ (from Latin ille meaning "he") is the act of referring to oneself in the third person instead of first person.
Illeism is sometimes used in literature as a stylistic device. In real life usage, illeism can reflect a number of different stylistic intentions or involuntary circumstances.
Read more about Illeism: In Literature, In Everyday Speech