In this theogony, which Ennius introduced into Latin literature, Saturn, "Titan," Vesta, Ceres, and Ops are siblings; Glauca is the twin of Pluto and dies mysteriously young. There are several mythological figures named Glauca; the sister of Pluto may be the Glauca who in Cicero's account of the three aspects of Diana conceived the third with the equally mysterious Upis. This is the genealogy for Pluto that Boccaccio used in his "Genealogia Deorum Gentilium" and in his lectures explicating the "Divine Comedy" of Dante.