To the family — They seem hereby to he confined not only to the same tribe, but also to the family of their tribe, as appears from the reason of the law, for God would have the inheritance of families as well as tribes kept entire and unmixed.
Related Commentaries of Numbers 36:6
Numbers 36:6
6 This is the thing which the LORD doth command concerning the daughters of Zelophehad, saying, Let them marrya to whom they think best; only to the family of the tribe of their father shall they marry.