Manes n. pl. : The benevolent spirits of the dead, especially of dead ancestors, regarded as family deities and protectors.

Example:
What product helps rebuild horses Manes?

Taxonomy
Manes, Lapis manalis, August 21, Gods, free encyclopedia, the underworld, over the stone, rain, dis manibus, spirits, Bailey, ceremony, Roman deities, search, 3rd-century, Christian, tombstone, dedication.

Defination from the web:
Manes were the souls of deceased loved ones. As minor spirits, they were similar to the Lares, Genii, and Di Penates. ... The gladiatorial games, originally held at funerals, may have been instituted in the honor of the Manes.[1] ...