Dinka is a Western Nilotic language from the Nilo Saharan language family, comprising five similar dialects and spoken by about 2-3 million Dinka people in southern Sudan.
From the Dinka-English dictionary [source: http://www.RogerBlench.info ]:-
wär / wɛɛ̈r ̈ SWr n. any body of water: river, lake or pond, water well. loc: wïïr.
wɛɛ̈r̈ NEd SWr SEb Sg: wär. n. rivers, lakes.
Hausa (West Chadic): ‘wuriya‘ [‘rushing stream’];
Miya (West Chadic): ‘wər‘ [‘lake’];
Now look at the European river names included in the map below, which is taken from Hans Krahe’s Unsere ältesten Flussnamen [“Our oldest river names”] (1964), and see the resemblance of these European river names to the Dinka words for ‘river’ :-