The idea is barely new or original, and Lana Del Rey automatically adopted the concept, because it is fitting so well with her façade of depraved poster-girl for the slutwave-sadcore who flirts with death.
Choosing a moniker for your band is a hard thing to do, there are already so many out there that it is unavoidable some good ones are going be reused or even stolen? Is it ever acceptable to steal a name? If the band was an obscure music act that everybody has forgotten, why not? Although it is ethically questionable, hey they got the idea first, right? If it was successful band, forget about it, there’s no way you re gonna do better.