the wergeld ‘the price of a man’ (with wer ‘man’), the price which was paid for the expiation of a crime, the ransom… compensation for murder by a certain payment, is equivalent to Gr. tísis; it is one of the ancient aspects of the geld.
Benveniste traces ransom etymologically to the wergeld tradition, establishing it as an archaic institution simultaneously religious, economic, and legal — a payment that expiates crime, redeems the offender, and restores social alliance.
, Indo European Language and Society, 1973thesis