|Easton's Bible Dictionary|
A peg, or a prince, one of the Edomitish kings of Mount Seir (Genesis 36:40).
Int. Standard Bible Encyclopedia
je'-theth (yetheth, meaning unknown): a chief (or clan) of Edom (Genesis 36:40 parallel 1 Chronicles 1:51), but probably a mistake for "Jether" = "Ithran" (Genesis 36:26).
Jetheth (2 Occurrences)
Genesis 36:40 These are the names of the chiefs who came from Esau, according to their families, after their places, and by their names: chief Timna, chief Alvah, chief Jetheth, (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
1 Chronicles 1:51 Hadad died. The chiefs of Edom were: chief Timna, chief Aliah, chief Jetheth, (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)