Gilead's wife bore him sons; and when his wife's sons grew up, they drove out Jephthah, and said to him, You shall not inherit in our father's house; for you are the son of another woman.
Notice how the writer of Judges constructed these first 11 verses parallel to Judges 10:6-16. The elders of Gilead had treated Jephthah exactly as Israel had treated Yahweh.