An Móir Leautheinn

The Viscountcy of the Wide Seas (Astrallic: Éusiorlteachd Nan Móir Leautheinn, Fernolian: Ísirliticht nan Már Éinghe, Rockallian: Uisiarlateachd nan Mhóir Luighain) is one of the six viscountcies of Rockall in the Seafaring Confederation. Its capital is Nuardhtheaobhoinn.

An Móir Leautheinn covers most of the west coast of Rockall, except for the Meoirr. The westernmost point of Rockall is also located in An Móir Leautheinn, on the island of Gléaoinnenoileun. It borders the viscountcy of Cóste Ígheainne along the northeast and east, and the viscountcy of An Thir na tÁirdteachd in the east, southeast and south.