Wiki information Chalcenterus:

Didymus Chalcenterus
Writer, Person, Deceased Person

Didymus Chalcenterus, ca. 63 BC to AD 10, was an Ancient Greek scholar and grammarian who flourished in the time of Cicero and Augustus.

Man, Deceased Person, Person

Tryphon or Trypho was a Greek grammarian who lived and worked in Alexandria. He was a contemporary of Didymus Chalcenterus. He wrote several specialized works on aspects of language and grammar, from which only a handful of fragments now survive....