Judges 6:32

Therefore on that day Gideon was called Jerubbaal , that is to say , Let Baal contend against him, because he broke down his altar .

So because Gideon broke down Baal`s altar, they gave him the name Jerub-Baal that day, saying, “Let Baal contend with him.”

Therefore on that day he called him Jerubbaal, saying, Let Baal plead against him, because he hath thrown down his altar.