Penny Juday was a Starfleet officer in the 24th century.
In 2372, she was named as a Spaceframe Development officer on the dedication plaque of the USS Enterprise-E. (Star Trek: First Contact, dedication plaque)
Ensign Juday later served in the Dominion War. In 2374, a file from the USS Repulse reported Ensign Juday wounded in action. A file from the USS Sarajevo reported her missing. A file from the USS Cochrane reported her killed. (DS9: "In the Pale Moonlight")
Juday's name appeared on the casualty list display seen on a computer readout in that episode. It is unclear which of the above was her home station, if any. The name is most likely an in-joke referencing Penny Juday, a member of the Star Trek production staff.