He feared his father's household - So it appears that his father was an idolater: but as Gideon had ten men of his own servants whom he could trust in this matter, it is probable that he had preserved the true faith, and had not bowed his knee to the image of Baal.
The mention of the “men of the city” by the side of Gideon‘s “father‘s household” suggests the probability of their being a remnant of the Canaanite population, and the special patrons of Baal-worship.