In ancient Roman religion, the Manes /ˈmeɪniːz/ or Di Manes are chthonic deities sometimes thought to represent souls of deceased loved ones. They were associated with the Lares, Lemures, Genii, and Di Penates as deities (di) that pertained to domestic, local, and personal cult. They belonged broadly to the category of di inferi, "those who dwell below," the undifferentiated collective of divine dead. The Manes were honored during the Parentalia and Feralia in February.
The theologian Augustine, writing about the subject a few centuries after most of the Latin pagan references to such spirits, differentiated Manes from other types of Roman spirits:
Latin spells of antiquity were often addressed to the Manes.(Wikipedia)