IshbakEaston's DictionaryLeaving, one of Abraham’s sons by Keturah (Gen. 25:2).Smith's Dictionary(left behind), a son of Abraham and Keturah, (Genesis 25:2; 1 Chronicles 1:32) and the progenitor of a tribe of northern Arabia. (B.C. after 1856.)International Standard Bible Encyclopediaish'-bak (yishbaq): A name in the list of sons of Abraham by Keturah (Ge 25:2 parallel 1Ch 1:32). These names probably represent tribes; the tribe of Ishbak has not been certainly identified.