Ellison or Elison (Ελλισών), modern form :-as, also Ellisson or Elisson (Ἑλισσών) was an ancient place in Arcadia

Arcadia

Arcadia is one of the regional units of Greece. It is part of the administrative region of Peloponnese. It is situated in the central and eastern part of the Peloponnese peninsula. It takes its name from the mythological character Arcas. In Greek mythology, it was the home of the god Pan...

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Ellison or Elison was the founder of the settlement, one of the fifty sons of Lycaon and relative of Pelasgus

Pelasgus

In Greek mythology, Pelasgus was the eponymous ancestor of the Pelasgians, the mythical inhabitants of Greece who established the worship of the Dodonaean Zeus, Hephaestus, the Cabeiri, and other divinities. In the different parts of the country once occupied by Pelasgians, there existed...

. From the seat flows the river of the same name (Ancient/Katharevoussa: Elisson) which was founded in the Lycaean country. Near Ellison featured the temple of Poseidon of Epoptus

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...

 with the statue of god, when Pausanias

Pausanias (geographer)

Pausanias was a Greek traveler and geographer of the 2nd century AD, who lived in the times of Hadrian, Antoninus Pius and Marcus Aurelius. He is famous for his Description of Greece , a lengthy work that describes ancient Greece from firsthand observations, and is a crucial link between classical...

 passed by it was headless..

The location of the place is unexcavated, it is believed to be located near Alonistaina

Alonistaina

Alonistaina is a village located in the municipal unit of Falanthos in the west central part of Arcadia, Greece. Alonistaina is accessed via a road linking Stemnitsa and Tripoli. It is located south of Vytina, 25 km west of Tripoli, north of Megalopoli, about 15 km east of Stemnitsa and...

, in which it founded an ancient tomb, ruined buildings and passed by the Elisson river (not the same as the one in the Korinthia prefecture) in which it still known today.