'Brothers' in the Bible

He may minister to his brothers at the Tent of Meeting by keeping watch, but he is not to engage in service. This is how you are to act with respect to the obligations of the descendants of Levi."

Moreover, bring your brothers from your father's tribe of Levi with you, so they may join you and minister to you while you and your sons with you stand in the presence of the Tent of Testimony.

Notice that I've taken your brothers, the descendants of Levi, from among the Israelis, giving them to you as a gift from the LORD to perform the service of the Tent of Meeting.

That very moment, one of the Israelis arrived, bringing to his brothers one of the Midianite women, right in front of Moses and the entire community of Israel, while they were weeping at the entrance to the Tent of Meeting!

If he doesn't have a daughter, give his inheritance to his brothers.

If he doesn't have brothers, give his inheritance to his father's brothers.

If his father doesn't have brothers, then give his inheritance to a relative who is nearest to him from the family and he'll take possession of it. This is to be a permanent ordinance for the Israelis, just as the LORD commanded Moses."