'Though' in the Bible

But though we, or an angel from heaven, should preach unto you any gospel other than that which we preached unto you, let him be anathema.

Brethren, I speak after the manner of men: Though it be but a man's covenant, yet when it hath been confirmed, no one maketh it void, or addeth thereto.

But I say that so long as the heir is a child, he differeth nothing from a bondservant though he is lord of all;