Lethy

The name Lethy is a rare and somewhat enigmatic name, most likely derived from the Greek word 'Lethe' (Λήθη), which means 'forgetfulness' or 'oblivion'. In Greek mythology, Lethe was one of the five rivers of the underworld, Hades. Souls of the dead were made to drink from the River Lethe to forget their earthly lives before reincarnation.

While 'Lethe' itself is not commonly used as a given name, 'Lethy' appears to be a diminutive or a variant form that softens the mythological association. Its usage as a personal name is very uncommon and it does not have a long, documented history of widespread use in any particular culture. It might be a modern coinage or a very rare historical usage that has not been widely recorded.