And among the Romans, an analogous festival was Parentalia, held in February in honor of family ancestors, culminating in the Feralia, when offerings were made to appease the spirits of the dead.
A second festival called Lemuria was held in May, for purging malevolent, restless, or vengeful spirits. These were the ghosts of those who were not given proper funeral rites by their families at death, or who had no families to bury them, and who thus could not make the journey to the underworld.
edit: Lucretius makes an oblique reference to Parentalia in Book 3: 31-58 with the word parentant: "to make a sacrifice in honor of the dead".