Patronymically from Yizr'e'l; a Jizreelite or native of Jizreel -- Jezreelite.
see HEBREW Yizr'e'l
H3158. Yizreeli
יִזְרְעֵאלִי masculine, יִזְרְעֵאלִית
feminine, adjective, of a people 1. masculine from יִזְרְעֶאל 1b; always הַיִּז ׳נָבוֺת 1 Kings 21:1, 4, 6, 7, 15, 16; 2 Kings 9:21, 25.
2. feminine from יִזְרְעֶאל 1a; always ׳הַיִּז אֲחִינֹעַם a wife of David; ending יִ֯ת 1 Samuel 30:5; 2 Samuel 2:2; 1 Chronicles 3:1; ending תִ֯ — 1 Samuel 27:3; 2 Samuel 3:2 (= 1 Chronicles 3:1).