zarach

And when the children of Esau saw that their king had died in battle they hastened and took a man from the people of the children of the east; his name was Jobab the son of Zarach, from the land of Botzrah, and they caused him to reign over them instead of Bela their king.

And it came to pass after this, at the end of ten years, Jobab, the son of Zarach, from Botzrah, died, and the children of Esau took a man whose name was Chusham, from the land of Teman, and they made him king over them instead of Jobab, and Chusham reigned in Edom over all the children of Esau for twenty years.

And the sons of Judah were Er, Onan, Shelah, Perez and Zarach.