Strong's #3509: Ytheyh (pronounced yeh-thayth')
of uncertain derivation; Jetheth, an Edomite: -Jetheth.
Brown-Driver-Briggs Hebrew Lexicon:
yethêth
Jetheth = "a nail"
1) one of the dukes of Edom who came of Esau
Part of Speech: noun proper masculine
Relation: of uncertain derivation
Usage:
This word is used 2 times:
Genesis 36:40: "duke Alvah, duke Jetheth,"
1 Chronicles 1:51: "duke Aliah, duke Jetheth,"