Of course it is usable. Being associated with the myth is not a bad thing.
Pandora is sort of the Greek mythological equivalent of the biblical
Eve, and that name is quite common. Most people will probably think of the jewellery company on hearing the name.
Pandora DaphnePandora HelenPandora CleoPandora EirenePandora MayPandora MaiaPandora CynthiaPandora HaleyPandora ThaliaPandora NyxPandora DionePandora LarisaPandora HermionePandora ChloePandora SophiePandora Stephanie