Sandon is an Orphic

Orphism (religion)

Orphism is the name given to a set of religious beliefs and practices in the ancient Greek and the Hellenistic world, as well as by the Thracians, associated with literature ascribed to the mythical poet Orpheus, who descended into Hades and returned...

 philosopher mentioned in the Suda

Suda

The Suda or Souda is a massive 10th century Byzantine encyclopedia of the ancient Mediterranean world, formerly attributed to an author called Suidas. It is an encyclopedic lexicon, written in Greek, with 30,000 entries, many drawing from ancient sources that have since been lost, and often...

. He is described briefly as a son of Hellanikos. He has been identified with the Sandon of Tarsus

Tarsus, Mersin

Tarsus is a historic city in south-central Turkey, 20 km inland from the Mediterranean Sea. It is part of the Adana-Mersin Metropolitan Area, the fourth-largest metropolitan area in Turkey with a population of 2.75 million...

 mentioned by Pseudo-Lucian in the essay Macrobii ("Long Lives"), who was the father of Athenodorus

Athenodoros Cananites

Athenodorus Cananites was a Stoic philosopher. He was born in Canana, near Tarsus ; his father was Sandon...

 (the Stoic philosopher and the tutor of Augustus Caesar). His father Hellanicus may have been the Orphic philosopher of the late 2nd century mentioned by Damascius

Damascius

Damascius , known as "the last of the Neoplatonists," was the last scholarch of the School of Athens. He was one of the pagan philosophers persecuted by Justinian in the early 6th century, and was forced for a time to seek refuge in the Persian court, before being allowed back into the empire...

.