In Greek mythology, was the preserver.
1. A surname of Jupiter, applied to him in Thespiae. A monstrous dragon devastated that territory, and the oracle had directed that a youth be given the monster each year. When the lot fell on Cleostratus, his friend Menestratus caused a brazen coat of mail to be studded with barbed hooks and points, in which the victim went out to meet his fate. He lost his life, but so did the dragon, and Thespiae erected a bronze statue to its deliverer Jupiter.
2. A surname of Bacchus, under which he was worshipped at Troezene and about Lerna.