The Eumolpidae were a family of priests at Eleusis who maintained the Eleusinian Mysteries

Eleusinian Mysteries

The Eleusinian Mysteries were initiation ceremonies held every year for the cult of Demeter and Persephone based at Eleusis in ancient Greece. Of all the mysteries celebrated in ancient times, these were held to be the ones of greatest importance...

 during the Hellenic era

Hellenistic Greece

In the context of Ancient Greek art, architecture, and culture, Hellenistic Greece corresponds to the period between the death of Alexander the Great in 323 BC and the annexation of the classical Greek heartlands by Rome in 146 BC...

. As hierophant

Hierophant

A hierophant is a person who brings religious congregants into the presence of that which is deemed holy. The word comes from Ancient Greece, where it was constructed from the combination of ta hiera, "the holy," and phainein, "to show." In Attica it was the title of the chief priest at the...

s, they popularized the cult and allowed many more to be initiated into the secrets of Demeter

Demeter

In Greek mythology, Demeter is the goddess of the harvest, who presided over grains, the fertility of the earth, and the seasons . Her common surnames are Sito as the giver of food or corn/grain and Thesmophoros as a mark of the civilized existence of agricultural society...

 and Persephone

Persephone

In Greek mythology, Persephone , also called Kore , is the daughter of Zeus and the harvest-goddess Demeter, and queen of the underworld; she was abducted by Hades, the god-king of the underworld....

.

The legendary genealogy of the Eumolpidae cast them as descendants of Eumolpus

Eumolpus

In Greek mythology, Eumolpus was the son of Poseidon and Chione. According to Apollodorus, Chione, daughter of Boreas and Oreithyia, pregnant with Eumolpus by Poseidon, was frightened of her father's reaction so she threw the baby into the ocean...

, one of the first priests of Demeter

Demeter

In Greek mythology, Demeter is the goddess of the harvest, who presided over grains, the fertility of the earth, and the seasons . Her common surnames are Sito as the giver of food or corn/grain and Thesmophoros as a mark of the civilized existence of agricultural society...

 at Eleusis, through his second son, Herald-Keryx. Eumolpus is named in the Homeric Hymn to Demeter. Through Eumolpus, they were supposedly related to either Poseidon

Poseidon

Poseidon was the god of the sea, and, as "Earth-Shaker," of the earthquakes in Greek mythology. The name of the sea-god Nethuns in Etruscan was adopted in Latin for Neptune in Roman mythology: both were sea gods analogous to Poseidon...

 or Hermes

Hermes

Hermes is the great messenger of the gods in Greek mythology and a guide to the Underworld. Hermes was born on Mount Kyllini in Arcadia. An Olympian god, he is also the patron of boundaries and of the travelers who cross them, of shepherds and cowherds, of the cunning of thieves, of orators and...

. The other family with a hereditary Eleusinian priesthood were the Kerykes

Kerykes

The Kerykes were one of the sacred Eleusinian families of priests that ran the Eleusinian Mysteries during the Hellenic era. They popularized the cult and allowed many more to be initiated into the great secrets of Demeter and Persephone. Starting about 300 BC, the state took over control of the...

.

The only requirements for initiation into the mysteries were a lack of "blood guilt", meaning having never committed murder, and not being a barbarian (able to speak Greek

Greek language

Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...

). Men, women and even slaves were admitted.

Further reading

• Jon D. Mikalson, Ancient Greek Religion (Wiley-Blackwell, 2010), p. 83 online.