(Ὅρκος), the personification of an oath, is described by Hesiod as the son of Eris, and the avenger of perjury. (Theog. 231, Op. 209 ; Hdt. 6.86.3.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890