Charles Brettner was a commercial transport passenger in the 24th century.
In 2328, the SS Kogin ferried him from Zed Lapis Sector Spaceport to Vulcan. His passenger manifest was accessed by Lieutenant Commander Data aboard the USS Enterprise-D in 2370 by reviewing this data in the commercial transport database. (TNG: "Inheritance", okudagram)
This character was only mentioned in writing.