sentences:  This is aside from the origin of a territory's name, such as in the custom of attributing it to an eponymous founder (Glywysing for "Glywys", Ceredigion for "Ceredig").The Welsh term for a political entity was "gwlad" ("country") and it expressed the notion of a "sphere of rule" with a territorial component.The Latin equivalent seems to be "regnum", which referred to the "changeable, expandable, contractable sphere of any ruler's power".