Brychon or Vrichona was the name of two different small rivers in Greece

Greece

Greece , officially the Hellenic Republic , and historically Hellas or the Republic of Greece in English, is a country in southeastern Europe....

. One of them flows from Mount Pelion

Pelion

Pelion or Pelium is a mountain at the southeastern part of Thessaly in central Greece, forming a hook-like peninsula between the Pagasetic Gulf and the Aegean Sea...

 in Magnesia

Magnesia Prefecture

Magnesia Prefecture was one of the prefectures of Greece. Its capital was Volos. It was established in 1899 from the Larissa Prefecture. The prefecture was disbanded on 1 January 2011 by the Kallikratis programme, and split into the peripheral units of Magnesia and the Sporades.The toponym is...

, Thessaly

Thessaly

Thessaly is a traditional geographical region and an administrative region of Greece, comprising most of the ancient region of the same name. Before the Greek Dark Ages, Thessaly was known as Aeolia, and appears thus in Homer's Odyssey....

 into the Pagasetic Gulf

Pagasetic Gulf

The Pagasetic Gulf is a rounded gulf in the prefecture of Magnesia that is formed by the Mount Pelion peninsula. It is connected with the Euboic Sea...

. It has been attested under that name since antiquity, and is today known as the location of Greece's oldest bridge made of fortified concrete, constructed for a train line in 1895. The other is said by ancient sources to have been in the Sithonia

Sithonia

Sithonia is a peninsula located south of the central part of Chalkidiki which is also in the south-central part of the Chalkidiki peninsula. The Kassandra Peninsula lies to the west and the Mount Athos peninsula at the east. Sithonia is also a municipality, covering the Sithonia peninsula...

 peninsula in Chalcidice

Chalcidice

Chalkidiki, also Halkidiki, Chalcidice or Chalkidike , is a peninsula in northern Greece, and one of the regional units of Greece. It is part of the region of Central Macedonia. The autonomous Mount Athos region is part of the peninsula, but not of the regional unit...

, Macedonia (Greece)

Macedonia (Greece)

Macedonia is a geographical and historical region of Greece in Southern Europe. Macedonia is the largest and second most populous Greek region...

, near Pallini. According to ancient mythology, the river god of the same name was an ally of the Gigantes

Gigantes

In Greek mythology, the Giants were the children of Gaia, who was fertilized by the blood of Uranus, after Uranus was castrated by his son Cronus...

 in their war against the gods, the Gigantomachy

Gigantomachy

In Greek mythology, Gigantomachy was the symbolic struggle between the cosmic order of the Olympians led by Zeus and the nether forces of Chaos led by the giant Alcyoneus...

, which according to some sources took place at Pallene.