They are named after the Barito River located in South Kalimantan, Indonesia.
The Malagasy language originates from the South East Borneo area (modern-day Indonesia), and it has been linked to Ma'anyan within the Southeast Barito group,[2] with Malagasy incorporating numerous Indonesian-Malay and Javanese loanwords.
[5][6][7] Based on linguistic evidence, it has been suggested that Malagasy was taken to East Africa between the 7th and 13th centuries.
[9][10] Blust (2006) proposes that the Sama-Bajaw languages also derive from the Barito lexical region, though not from any established group,[11] and Ethnologue has followed, calling the resulting group 'Greater Barito'.
Some Barito-speaking Dayak ethnic subgroups and their respective languages in West Kalimantan province, Indonesia:[14][15]