Placenames are seemingly universal, with the potential to reveal different systems of organizing information in everyday communication. We report on the relationship between placenames in Jahai, an indigenous language spoken by the Jahai people of the Malay Peninsula, and the environment. Our approach explores the tendency to organize names using a hierarchy of kinship associated with the cnεl, mythological entities in origin stories, which appears to map onto catchment areas. By associating linguistic data with these ethnographic inputs and geographical properties calculated in a Geographic Information System, we generate and make suggestions for productive ways of understanding placenames as systems.