The Troglodytae (Greek: Τρωγλοδύται), or Troglodyti (literally "cave goers"), were a people mentioned in various locations by many ancient Greek and Roman geographers and historians, including Herodotus (5th century BC), Agatharchides (2nd century BC), Diodorus Siculus (1st century BC), Strabo (64/63 BC – c. 24 CE), Pliny (1st century CE), Josephus (37 – c. 100 CE), Tacitus (c. 56 – after 117 CE), etc.
The earlier references allude to Trogodytes (without the l), evidently derived from Greek trōglē, cave and dytes, divers.
Herodotus referred to the Troglodytae in his Histories as being a people hunted by the Garamantes. He said that the Troglodytae were the swiftest runners of all humans known and that they ate snakes, lizards, and other reptiles. He also stated that their language was unlike any known to him, and sounded like the screeching of bats. According to Alice Werner (1913), this was a clear allusion to the early Khoisan since, aside from being hunter-gatherers, their native languages contain distinctive click sounds.
In his work Geographica, Strabo mentions a tribe of Troglodytae living along with the Crobyzi in Scythia Minor, near the Ister (Danube) and the Greek colonies of Callatis and Tomis.
Flavius Josephus alludes to a place he calls Troglodytis while discussing the account in Genesis, that after the death of Sarah, Abraham married Keturah and fathered six sons who in turn fathered many more. "Now, for all these sons and grandsons, Abraham contrived to settle them in colonies; and they took possession of Troglodytis, and the country of Arabia Felix..."