A "dynasty" is a series of rulers from the same family. Solís was ruled by the Espinosas from about 500 years ago to the time of the events of Just Cause 4. It's not known what any of their formal titles were has heads of state.
Sargento mentions at one point that the base Puerto Málaga was named after the port in Spain where the Espinosa family came to Solís from. Málaga is a real place in Spain. This is confirmed by the locations map info. There is one more location where according to the map info, the Espinosa family had scuttled their galleon.
Known members of the dynasty are listed below. To avoid spoilers, see their character pages for more details about them.
- Diego Espinosa - He was a conquistador in the spanish military and the first european man to set foot at Solís. He took over Solís and turned it into his own de facto kingdom.
There were many people who ruled in between here, but we don't know anything about them.
- Leon Espinosa - He is known to have maintained power through rigged elections. He also started the Project Illapa for peaceful purposes.
- Oscar Espinosa - Maintained power with his private military, the Black Hand. He converted the Project Illapa into a super-weapon, with the intention of selling it for profit.