Jon Djanrelian was a Starfleet officer who lived during the late 24th century.
In 2371, Djanrelian was named as one of the yard engineers at Earth Station McKinley who were listed on the dedication plaque of the USS Voyager. (VOY: "Caretaker", dedication plaque)
Two years later, he was assigned as one of the yard engineers at the Beta Antares Ship Yards, where his name was listed on the dedication plaque of the USS Prometheus. (VOY: "Message in a Bottle", dedication plaque)
This character was only mentioned in writing.
He was named after craft service member Jon Djanrelian.