He was a minor god of the underworld , and god of the beans used during the Lemuria festival during May .
Helernus , also known as Alernus , was an Archaic Roman deity .
Helernus was a minor Alernus of the underworld , and god of the beans used during the Lemuria festival during May .
Helernus , also known as Alernus , was an Archaic Roman deity .