Zelus
The personification of zeal or strife, is described as a son of Pallas and Styx, and a brother of Nice. ( The Theogony of Hesiod 384 ;The Argonautica by Apollonius Rhodius)
From Smith's Dictionary of Greek and Roman Biography and Mythology(ll. 383-403) And Styx the daughter of Oceanus was joined to Pallas and bare Zelus (Emulation) and trim-ankled Nike (Victory) in the house. Also she brought forth Cratos (Strength) and Bia (Force), wonderful children. These have no house apart from Zeus, nor any dwelling nor path except that wherein God leads them, but they dwell always with Zeus the loud-thunderer. For so did Styx the deathless daughter of Oceanus plan on that day when the Olympian Lightener called all the deathless gods to great Olympus, and said that whosoever of the gods would fight with him against the Titans, he would not cast him out from his rights, but each should have the office which he had before amongst the deathless gods. And he declared that he who was without office and rights as is just. So deathless Styx came first to Olympus with her children through the wit of her dear father. And Zeus honoured her, and gave her very great gifts, for her he appointed to be the great oath of the gods, and her children to live with him always. And as he promised, so he performed fully unto them all.
From The Argonautica by Apollonius Rhodius
And so, when he thought that he had escaped bitter death from the chiefs, fate entangled him that very night in her toils while battling with them; and many champions withal were slain; Heracles killed Telecles and Megabrontes, and Acastus slew Sphodris; and Peleus slew Zelus and Gephyrus swift in war.
