Jenny Delaney

Jenny Delaney was a Human Starfleet crewman. In 2371, she was assigned to USS Voyager's Stellar Cartography section when that vessel was pulled into the Delta Quadrant by the Caretaker. (VOY: "Caretaker", "Time and Again")

Family
Jenny Delaney was the daughter of prominent Federation scientists, Drs. Henrik and Samantha Delaney, and twin sister of Megan Delaney.

Effects of Disappearance in 2371
The disappearance of Jenny Delaney and Voyager in 2371, coupled with the disappearance of Henrik Delaney and the destruction of their work and research, drove Samantha Delaney insane. (Star Trek: The Cantabrian Expeditions: "An Innocent Time")