Akademik

Hadar
   Adod, brave(?).
   1) A son of Ishmael (Gen. 25:15); in 1 Chr. 1:30 written Hadad.
   2) One of the Edomitish kings (Gen. 36:39) about the time of Saul. Called also Hadad (1 Chr. 1:50, 51).
   It is probable that in these cases Hadar may be an error simply of transcription for Hadad.

Easton's Bible Dictionary. . 1897.