Conversation so far:
What was significant during the Pre-19th century?
Historically, Afaan Oromo-speaking people used their own Gadaa system of governance.
What type of government did they have?
Oromos also had a number of independent kingdoms, which they shared with the Sidama people.

Question: What were some of their other kingdoms?
Self-contained rewrite: Besides Sidama people, what were some of other Oromo people kingdoms?