No, don't think so. There are plenty of names for landmasses, in where players where, but very little for bodies of water.
My idea would be to name the sea coasts making references to/honoring some historical realms that where there.
To explain a little better:
Aquilegia is a flower known for its spurred petals. Hence the Spurred Coast in where the Aquilegian theocracy was (in Flowrestown).
In where the Sea of Silence is we curiously had Melodia before. I think the bird in their banner is a nightingale, but could be wrong. So: Nightingale Sea.
Gelene was known as the Emerald of the North for the Everguardians. So: Channel of Gelene = Emerald Channel. This also works with Nifelheim being known as the Jewel of the North by the Summerdalians.
The Gold Coast is repeating a color-naming pattern that is, to be honest, a little overused. While it makes sense for it includes Golden Farrow I'd change it to Griffin Coast, the symbol of the now deceased Caerwyn, which first settled it.
The Northern Passage to Storms Passage is only natural, since it borders the Storms End and the Storms Keep, though it could also work as the Summer Passage in combination to the Spring Passage (Springdale, Summerdale).
And while the Spring Coast makes sense the area is known as the
Dalian Expanse, and its inhabitants the Dalians. When Summerdale fell and many of its nobles fled to Luria Nova they brought south their culture, and they are still known as "Dalians". Hence Dalian Coast.