Commonly linked by folk etymology to Latin niger (“black”), which likely influenced the modern spelling. Some sources give the term to Tuareg roots, deriving it from a claimed gher n-gheren or egereou n-igereouen (“river of rivers”). Compare Tarifit iɣzar-n-iɣezran. Older sources derive Niger, via a series of mistranslations and geographic misplacements by Greek, Roman and Arab geographers, from Ptolemy's descriptions of the wadi Gir (in modern Algeria) and the "Lower Gir" (or "Ni-Gir") to the south.