Dantang was a location.

During the Tarsian War, the Robmeybur Rebellion began in Dantang and spread out.

In 2366, this location was mentioned in Roga Danar's military service records, which were accessible to the crew of the USS Enterprise-D via the Angosian senatorial database. (TNG-R: "The Hunted", okudagram)

This location was only mentioned in writing.
Dantang is named after Angelo Dante, a production assistant at CBS Home Entertainment, who worked on the remastered TNG project.