From an unused root corresponding to shbaq; he will leave; Jishbak, a son of Abraham -- Ishbak.
see HEBREW shbaq
H3435. Yishbaq
יִשְׁבָּק proper name, masculine son of Abraham and Ketûrâh, Genesis 25:2; 1 Chronicles 1:32; Ιεσβοκ (B Σοβακ Chronicles).