Geniscus is a deity who appears in a sermon of Saint Eligius along with Neptune, Orcus, Minerva and Diana. These are all, the Christian homilist says, "demons" who should not be believed in or invoked. The warning implies cult activity for these deities in the northern parts of Merovingian Gaul into the 7th century.
The late-antique Geniscus may be a form of the Roman Genius, pictured here in a 1st-century BC wall painting
Pre-Raphaelite version of the lamia by John William Waterhouse
Diana is a goddess in Roman and Hellenistic religion, primarily considered a patroness of the countryside and nature, hunters, wildlife, childbirth, crossroads, the night, and the Moon. She is equated with the Greek goddess Artemis, and absorbed much of Artemis' mythology early in Roman history, including a birth on the island of Delos to parents Jupiter and Latona, and a twin brother, Apollo, though she had an independent origin in Italy.
Diana as Huntress. Marble by Bernardino Cametti, 1720. Pedestal by Pascal Latour, 1754. Bode Museum, Berlin.
Statue of Diana-Artemis, fresco from Pompeii, 50–1 BCE
Diana Hunting, Guillaume Seignac
Diana as Personification of the Night. Anton Raphael Mengs, c. 1765.