Nora Leonhardt was a commercial transport passenger in the 24th century.

In 2328, the SS Wisconsin ferried her from Vendikar Spaceport to the Rigel VII Lagrange colony. Her 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.
Leonhardt was named after regular TNG background actress and stand-in Nora Leonhardt.