The Duchy of Ahrmahk was a Charisian patent of nobility.

It made its holder the ruler of a large area on the Charisian mainland, located between the Lizard Range in the east and Howell Bay in the west. It was neighbored by Nearoak in the north and Rivermouth in the south. (map)

By the Year of God 894, it was held by the head of the House of Ahrmahk, meaning Emperor Cayleb himself. (AMF)