Names for Privacy Lovers and Secret Keepers

In Greek mythology, Lethe was the name of one of the five rivers in Hades, the underworld. Lethe was also the name of the Greek spirit of forgetfulness and oblivion, with whom the river was often identified.

Pretty sound, provocative meaning, but a little over-the-top.

Better for a perfume.

Name with connotations both mystical and tragic, newly popular in Europe. For English speakers, though, this name might be ruined by its homonym ruin.

Mysterious.