By lot; which lots seem to have been cast only for the tribes, not, as some would have it, for the several families, for the distribution of it to them was left to the ruler's wisdom, according to the rule now given, Numbers 26:54. Yet if any lot was too large for the tribe, they might give up part of their right to others, with the ruler's consent, as Judah gave a share to Simeon and to Dan within his lot. According to the names of the tribes, i.e. the lots shall go under the names of each tribe or each patriarch.
Related Commentaries of Numbers 26:55
Numbers 26:55
55 Notwithstanding the land shall be divided by lot: according to the names of the tribes of their fathers they shall inherit.