Grim Reaper: from medieval European folklore, the generic name given to the personification of death, the arbitrary collector of mortal lives. Also known as 'Death' and the 'Grim Sage', and often confused with 'Old Father Time'.
The 'Reaper' is generally depicted as a priest-robed skeletal being, carrying a scythe, needed for his eternal work of the harvesting of souls. The word grim, meaning severe, cruel, harsh is Old English, derived from ancient Germanic.