No'dab. (nobility). The name of an Arab tribe, mentioned only in 1 Chronicles 6:19, in the account of the war, of the Reubenites against the Hagarites. 1 Chronicles 6:9-22. It is probable that Nodab, their ancestor, was the son of Ishmael, being mentioned with two of his other sons , in the passage above cited, and was, therefore, a grandson of Abraham.