וְנֵר֙ הוֹלִ֣יד אֶת־קִ֔ישׁ וְקִ֖ישׁ הוֹלִ֣יד אֶת־שָׁא֑וּל וְשָׁא֗וּל הוֹלִ֤יד אֶת־יְהֽוֹנָתָן֙ וְאֶת־מַלְכִּי־שׁ֔וּעַ וְאֶת־אֲבִינָדָ֖ב וְאֶת־אֶשְׁבָּֽעַל׃
And Ner begot Kish; and Kish begot Saul; and Saul begot Jonathan, and Malchi-shua, and Abinadab, and Eshbaal.
Rashi on I Chronicles
Eshbaal That is Ish Bosheth, and he is nicknamed “bosheth,” because “baal” is an expression of lordship, and he nicknamed him “bosheth,” an expression of disgrace.