Nena (the band, until 1987)
This is the band Nena Kerner was member of. All of the albums that were released before the band dissolved belong here. Nowadays Nena Kerner performs as Nena though and released solo albums titled like that. Those should be moved to her performance name.
If you know more about her history please help correcting this!
More info about cases like that in the wiki.
Nena was a German Neue Deutsche Welle band, best known for their 1983 hit "99 Luftballons".