The personification of zeal or strife, is described as a son of Pallas and Styx, and a brother of Nice. (Hes. Theog. 384 ; Apollod, i. 2. § 4.) Invidia (Zelus), the personification of envy, is described as a daughter of the giant Pallas and Styx. (Hygin. Fab. Praef.; Ov. Met. ii. 760.)