originated?

                                  Answer:
   
   Originally, there were no engraved tombstones like we have today.
   Originally, tombs were marked with a simple cairn, a simple pile of
   stones. This meant that wind and rain would cause the tomb marker to
   wear down. Each visitor would therefore add to the pile again, to show
   respect, that the deceased was remembered. Over the years, a mound of
   stones would accumulate, memorializing the deceased through the hands
   of his/her loved ones.
   
   The tombstone we have today serves as another form of cairn.
   Originally, names were not put on a tombstone; this is a more modern
   custom. Although Jews now follow this practice, many people still
   continue the earlier custom of leaving stones.