The article seeks to emphasise the need for greater cooperation between toponomasticians and cartographers, since both of these disciplines deal with marking a natural referent by way of a name or a drawing. The second important issue raised in the present article is the analysis of the toponomastic systems without a permanent linguistic centre which, through speech and linguistic practice, normally regulate the consistency of the toponomastic monovalence (one island = one name). As a centre for research of this phenomenon does not exist in the Kornati Archipelago, numerous communities in the vicinity of this group of islands practice the naming of islands po svoju (in their own way), which results in bi-namedness and tri-namendness. Modern cartography is right in ignoring this fact and offers complete monovalence. However, geographic maps through the history reveal that this has not always been so, and that this region has been characterised by considerable confusion in naming relevant islands. Among those who contributed to this confusion were the cartographers of earlier times.