Tuckerization (or tuckerism) is the act of using a person’s name in an original story as an in-joke. The term is derived from Wilson Tucker, a pioneering American science fiction writer, fan and fanzine editor, who made a practice of using his friends’ names for minor characters in his stories. For example, Tucker named a character after Lee Hoffman in his novel The Long Loud Silence, and after Walt Willis in Wild Talent.

https://en.wikipedia.org/wiki/Tuckerization