5. these are the names of the men that shall stand with you, &c.--Each is designated by adding the name of the ancestors of his tribe, the people of which were called "Beni-Reuben," "Beni-Levi," sons of Reuben, sons of Levi, according to the custom of the Arabs still, as well as other nations which are divided into clans, as the Macs of Scotland, the Aps of Wales, and the O's and the Fitzes of Ireland [CHALMERS].

JFB.