“Sihor” means dark

Sihor: accurately Shi'hor, once The Shihor, or Shihor of Egypt, when unqualified a name of the Nile. It is held to signify "the black" or "turbid." In Jeremiah the identity of Shihor with the Nile seems distinctly stated. (Jeremiah 2:18) The stream mentioned in (1 Chronicles 13:5) is possibly that of the Wadi l' Areesh .