In Vietnam toponymy has been studied is addressed from different approaches, including geo-historico-cultural, and linguistic. Such distinction is merely relative because toponymy involves the study of the culture of each geographical area marked by certain nomenclatures. Depending on the data processing methods, each approach will make different contributions to the clarification of the cultural content embodied by each nomenclature in question. In this paper, the study of the place name of Co Loa village is used as an illustration of the two afore-mentioned approaches. The author adopt the historico-comparative linguistic perspective in clarifying the evolution of a particular place name, which supplements the geohistorico-cultural approach. The analysis and explanation reveal that the present Sino-Vietnamese form of the name Co Loa is very likely to have originated from a place name in Austronesian languages.