quietus -
euphemisms for death (based on an analogy between lying in a bed and in a tomb); "she was laid to rest beside her husband"; "they had to put their family pet to sleep"
quietus -
A stillness or pause; something that quiets or represses; removal from activity; especially: death.
quietus -
Final settlement as of a debt.
Wikipedia
Titus Fulvius Iunius Quietus (died 261) was a Roman usurper against Roman Emperor Gallienus. Quietus was the son of Fulvius Macrianus and a noblewoman, possibly named Iunia. According to Historia Augusta, he was a military tribune under Valerian, but this information is challenged by historians.