This paper is concerned to re-examine Aboriginal spatial organization in the far northwest region of Victoria from Mildura to the Victorian border with South Australia. RMW Dixon (Working Papers) has noted that there is a multiplicity of names of groups in this region, and their status must be resolved. It does this by examining the primary sources and nineteenth century reconstructions such as Thomas, Goodwin, Smyth, Mathews, and Howitt, and then through a more critical analysis of twentieth century reconstructions such as Tindale. It finds that south of the Murray River and west of Mildura there were two language groups: Keramin (which included Jarijari at Mildura) and Yuyu to their west. Keramin at Mildura claimed country on both sides of the Murray River, however the Yuyu were only on the southern side of the river. The northern side of the Murray River belonged to Marawara, the southernmost dialect of Pakantji. The presence of the Marawara south of the Murray River is considered a post-contact adaptation.