Multiple realities(covers information from several alternate timelines)
Sandra Peterson was a Starfleet officer in the 24th century. Her serial number was BV-215-4779 LZN.
In 2371, she was a crewmember aboard the USS Voyager. She was among the crew stranded in the Delta Quadrant, when Voyager was forcefully brought there by the Caretaker.
In an alternate timeline, her last name was read aloud by Harry Kim, in early 2372, when he reviewed the Voyager's crew manifest. (VOY: "Non Sequitur")
In 2376, her name was listed on a crew manifest. (VOY: "11:59")