Greskrendtregk is the Ktarian husband of Ensign Samantha Wildman. He was left behind when she vanished on the USS Voyager. His daughter, Naomi Wildman, was born in the Delta Quadrant. (VOY: "Deadlock")
Numerous references were made about him throughout Voyager. It seems he remained on Deep Space Nine for some time after Voyager's departure. He may also have been a member of the stations crew.