The Earldom of Rochair was a Corisandian patent of nobility.
Corisande Island

It made its holder the ruler of a large territory in the south of Corisande Island, between the Earldom of Windshare in the west, the Barony of Granite Hill in the north, the Earldom of Tartarian in the west, the Earldom of Windshare, and the Barony of Shai in the south. (map)

During the invasion of Corisande, the Earldom, along with the Barony of Brandark, were thought of as a potiential landing sites, until it was decided to go with the Barony of Dairwyn.(BHD)