Vittorio Bottego, who explored the area in the later 1890s, proposed naming the river after Admiral Simone Antonio Saint-Bon.
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Part of the Nuer Zone, Wentawo is bordered on the south by Akobo, on the west and north by South Sudan, on the east by Jikawo, and on the southeast by Anuak Zone; the Akobo to the west and the Baro River on the north define Wentawo's boundaries with South Sudan.