Ogbronuagum, also called Bukuma after a village in which it is spoken, is a Central Delta language of Nigeria.
So it would be okay to join the two words "Ogbronu" and "Agum" as "Ogbronuagum".
The language is spoken by people in a town called Bukuma in Rivers State of Nigeria.
The towns are close and are both in Rivers State of Nigeria.
This article about Cross River languages is a stub.