Rashi on the Former Prophets

Ben Dodo. This was his name.

Thoroughbreds.עוּלִין, the choicest horses.
They owned thirty towns. They owned thirty unwalled municipalities. This is why they are described as עַיָרִים, "towns", meaning the same as עַיָירָוֹת.

The Baals. Seven pagan gods are enumerated here.
They abandoned Adonoy, and did not worship Him. Not even concurrently with these.

That year when Yair died.
Across the Yardein. The territory of Reuven, Gad, and half of Menasheh; they were neighbors.

Was it not from Mitzrayim. There are seven salvations here, corresponding with the seven pagan gods they worshiped.

And Maon. The name of a nation.

Could not contain Himself at [Yisroel's] anguish. As if one could depict God as lacking the space to bear and encompass His pain at Yisroel's anguish.

Were called together. They were assembled by proclamation.