Coastal Confederation

The (: Confederación Costeira) was a  alliance of several duchies in southwest Alutra now part of present-day Ventora. It was formed in response to the Confederation of Montaña to its west. The Coastal Confederation was primarily an economic and defensive pact with no formal central government other than the Council of Dukes (Consello de Duques). Nonetheless, as the richest duke, the Duke of Plenas was the "first among equals" and was accorded the honorific of Grandee.

Member states
Eight dukes signed the Coastal Protocols on June 20, 274. Additional duchies joined the confederation in 275, 282, 289, and 291. At its height, 12 duchies were members.