Strong's #3435: Yishbaq (pronounced yish-bawk')
from an unused root corresponding to 7662; he will leave; Jishbak, a son of Abraham:--Ishbak.
Brown-Driver-Briggs Hebrew Lexicon:
ּׁ
yishbâq
Ishbak = "he releases"
1) a son of Abraham by Keturah and progenitor of an Arabian tribe
Part of Speech: noun proper masculine
Relation: from an unused root corresponding to H7662
Usage:
This word is used 2 times:
Genesis 25:2: "and Jokshan, and Medan, and Midian, and Ishbak, and Shuah."
1 Chronicles 1:32: "and Jokshan, and Medan, and Midian, and Ishbak, and Shuah. And the sons of Jokshan; Sheba,"