Manors
Manors are a bit like a well-funded expeditionary outpost. Though their populations are sized similarly to hamlets, manors will often have a much more highly specialized set of services, as well as fortifications and at least one strong connection to their parent civilization.
Manors tend to have a better survival rate than hamlets, since they begin with more organization and more resources, but their size will still make them vulnerable to many threats that larger settlements can more easily survive.