Gabriel

From Memory Alpha, the free Star Trek reference.

You may also be looking for the Biblical archangel named Gabriel.

Gabriel was a young inhabitant of Gaia, and a descendant of the crew of the USS Defiant.

His existence was wiped out, along with that of the other inhabitants of Gaia, when Odo altered the flight plan of the Defiant to avoid the crash that stranded the crew on Gaia, preventing the creation of the alternate timeline. (DS9: "Children of Time")

Gabriel was played by Jesse Littlejohn.