When two people have the same name they are called tocayo. Usage is like this: Uno de los alumnos en la clase es tocayo mio. (One of the students in the class has the same name as I.)

While we have the word docent in English, I don’t know that I have ever heard it used. In English it seems to be used to denote a guide or teacher with a seeming undertone that the person is doing volunteer work.  Docente in Spanish refers to an educator, teacher or private tutor.