Shofetim 8:30

30 And Gid’on had threescore and ten banim of his own; for he had many nashim.

Shofetim 8:30 Meaning and Commentary

Judges 8:30

And Gideon had seventy sons of his body begotten
Not after his victories, for it is plain he had children before; mention is made of Jether, his firstborn, as a youth able to draw a sword, and slay with it, ( Judges 8:20 ) but this was the number of all his sons, both before and after, and a large number it was; and the phrase "of his body begotten", or "that went out of his thigh" is used to show that they were his own sons, begotten in wedlock, and not sons that he had taken into his family by adoption, or that he was father-in-law to, having married a woman or women that had sons by a former husband; but these were all his own:

for he had many wives;
which, though not agreeable to the original law of marriage, was customary in those times, and even with good men, and was connived at; and this is a reason accounting for his having so many sons.

Shofetim 8:30 In-Context

28 Thus was Midyan subdued before the Bnei Yisroel, so that they lifted up their heads no more. And HaAretz was in quietness arba’im shanah in the days of Gid’on.

29 And Yerubaal ben Yoash went and dwelt in his own bais.

30 And Gid’on had threescore and ten banim of his own; for he had many nashim.

31 And his pilegesh (concubine) that was in Shechem, she also bore him a ben, whose shem he called Avimelech.

32 And Gid’on ben Yoash died in a good old age, and was buried in the kever of Yoash his av, in Ophrah of the Aviezri.