Not sure if this is the right place.
Follow-up: When did this connotation become most apparent?
hi! there's lots of room for more info here, but meanwhile, check out these related posts:
Why Are Scythes Often Associated with the Personification of Death and the Grim Reaper?
did/do different cultures anthropomorphize Death? universal was the "Grim Reaper" version?
if you have followup questions on old posts, ask them here & include the relevant user's username so they'll get an auto-notification