the bond established between a man who possesses authority and the man who is subjected to him by a personal pledge. This ‘loyalty’ gives rise to an institution which is very ancient in the western Indo-European world
Benveniste establishes loyalty’s etymological foundation as a formal, asymmetric institutional pledge rooted in Germanic Treue, tracing it through the Indo-European lexicon of trust and fidelity.
, Indo European Language and Society, 1973thesis