Standard lexica (BDB, HALOT, Gesenius18) and TDOT (Conrad) derive נָדִיב from a volitional root נדב "to incite, impel, urge," treating "noble" as a Northwest-Semitic specialization: the etymological "one who impels himself" becomes the magnanimous donor, then the noble of character, then the social-class aristocrat. DCH (Clines) declines to posit a single etymological core and lists the senses paratactically. Comparative evidence favors the volitional core: Arabic ndb "to call, summon, volunteer" (Form I and VIII), the Old Aramaic Zinjirli abstract noun "incitement," and Amorite Mari onomastics (Huffmon; the name Ammu-nadbi, cognate to Amminadab). Akkadian nindabu is now widely judged a Sumerian loan rather than a true cognate, and nadanu "to give" belongs to a separate root. The distribution is diachronically layered: the volitional sense dominates the archaic poetry of Judges 5 and the Priestly tabernacle account (Sarna, Childs, Propp), while the social-rank sense prevails in Job, Proverbs, and the Psalms (Clines on Job 34:18; Fox and Waltke on Proverbs; Hossfeld-Zenger and Kraus on the Psalms). Isaiah 32:5-8 exploits the friction between rank and character, and most commentators (Wildberger, Childs, Sweeney, Beuken, Williamson) read v. 8 as a deliberate moral redefinition rather than a flat class term, against Oswalt (character only) and Kaiser (rank). Song 6:12 is textually undecidable, the ancient versions reading a proper name (Amminadab) and moderns splitting among "noble people," "with the prince," and a proper-name cipher (Pope, Fox, Keel, Exum, Longman).