4) and 7) could be named after the nearby islands, so:
4) Jimsonweed Strait [@GI-Land do you have any alternative suggestions?)
7) Revolution Strait
Also, I'd like to keep the naming of the "Sea of the Red Starred Skull" for the waters in front of Bayougrad.
Brother Unclepear
Dear Leader of the Voodoo People's Republic of Bruuma
Representing also
El Pollo Diablo
Boss Maximo of the Estado Libre Asociado of Puerto Pollo
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Chairman Lo Pol
Core Leader of the People's Republic of Kai Fa