What does Judges 8:19 mean?

And he said, They were my brethren, the sons of my mother: as Jehovah liveth, if ye had saved them alive, I would not slay you.

And he said, They were my brethren, even the sons of my mother: as the Lord liveth, if ye had saved them alive, I would not slay you.

And he said, They were my brethren, the sons of my mother: as Jehovah liveth, if ye had saved them alive, I would not slay you.

And he said, They were my brothers, my mother's sons: by the life of the Lord, if you had kept them safe, I would not put you to death.

And he saith, `My brethren--sons of my mother--they; Jehovah liveth, if ye had kept them alive--I had not slain you.'

He answered them: They were my brethren, the sons of my mother. As the Lord liveth, if you had saved them, I would not kill you.

And he said, They were my brethren, the sons of my mother. [As] Jehovah liveth, if ye had saved them alive, I would not slay you.