We should probably make Commander and Duke combine in the same way as government positions combine. E.g. Commander and Duke of X rather than Commander of X, Duke of X
Except that eventually, the Duke of Iato might be the Count of Sandlakes, and not the Commander of Iato. Equally, if I understood correctly that duchies will be able to be named in a customized manner (I might have misunderstood), then the commander of Iato may end up being the Duke of Awesomia.