Matthew Poole and continuators on Joshua 15:16

16 ¶ And Caleb said, He that smiteth Kirjathsepher, and taketh it, to him will I give Achshah my daughter to wife .

Which is to be understood with some Conditions, as if he were one who could marry her by Gods Law; for every Promise contrary to that, is void; and if she were willing; for though Parents had a great Power over their Children, they could not force them to marry any person against their own wills. He might otherwise be an unfit and unworthy person; but this was no ordinary motion propounded to the imitation of others, but a divine impulse, that Othniel's valour might be more manifest, and so the way prepared for his future Government of the People, Iudg. 3. 9.