Hadar
Easton's Dictionary
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.
Smith's Dictionary
[Hadad]
International Standard Bible Encyclopedia
ha'-dar (Ge 36:39).
See HADAD (3).