Which preposition to use with iberians

of Occurrences 2%

The Iberians of Spain are the first to be detached; then the Germans.

after Occurrences 1%

Armenia fell into the hands of Mithridates, son of Mithridates the Iberian, of course, and a brother of Pharasmanes, who became king of the Iberians after him.

Which preposition to use with  iberians