Origin of repudiation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Word Origin and History for non-repudiation
1540s, "divorce" (of a woman by a man), from Latin repudiationem (nominative repudiatio) "a rejection, refusal," noun of action from past participle stem of repudiare (see repudiate). Meaning "action of disowning" is from 1840s.
Online Etymology Dictionary, © 2010 Douglas Harper