1) Medieval law 2) Scottish clan 
Manrent refers to a Scottish contract of the mid-15th century to the early 17th century, usually military in nature and involving Scottish clans. The bond of manrent was commonly an instrument in which a weaker man or clan pledged to serve, in return for protection, a stronger lord or clan—in effect becoming a vassal that renders service to a su...
• (n.) Homage or service rendered to a superior, as to a lord; vassalage.