The term coadjutor (or coadiutor, literally "co-assister" in Latin) is
a title qualifier indicating that the holder shares the office with
another person, with powers equal to the other in all but formal order
of precedence.These include:These include:The office is ancient.
"Coadjuter", in the 1883 Catholic Dictionary, says:Another source
identifies three kinds of coadjutors: Coadjutor Top Movies & Young Movies