nam (nam), n.[Old English naam] Hist. The act of distraining property.
nam (nam or nahm), prep. [Latin] For.
“Nam …. This particle is frequently used as introductory to the quotation of a maxim, and sometimes erroneously treated as a part of the maxim quoted.” 2 Alexander M. Burrill, A Law Dictionary and Glossary 219 (2d ed. 1867).
[Blacks Law 8th]