Ishbak

A man, in the time of the Patriarchs · Early Patriarch · named in 2 verses

the name means he will leave Strong's Lexicon

Ishbak was a son of Abraham and his concubine Keturah.

From Easton's Bible Dictionary

Leaving, one of Abraham's sons by Keturah (Gen. 25:2).

Easton's Illustrated Bible Dictionary, 1897 — public domain, quoted in full and unedited.

From STEPBible's TIPNR genealogy data. A relationship the data marks uncertain is not shown here.

First named at Genesis 25:2.

Genesis 25:2 and she bore him Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah.
1 Chronicles 1:32 The sons born to Keturah, Abraham’s concubine: Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah. The sons of Jokshan: Sheba and Dedan.