Crosswinds Sea
The Crosswinds Sea is the sea between Zenwey and Areth on the official world map. It runs diagonally from the Island of Fae south-west toward Rislandia and Artrebla. Voyages from Rislandia to Zenwey, like the Liliana's in The Blood of Giants, would cross these waters on the map's geography. The books describe that ocean crossing without naming it, and other wiki pages call the water between the continents the Golgmarsh Ocean. Whether the Crosswinds Sea is part of the Golgmarsh Ocean is a question for the author.
Sources
Known only from the official world map. The name does not appear in any of the novels or short stories processed so far. The History of Rislandia bible, which is processed next, may add more detail.