Pelethites
   mentioned always along with the Cherethites, and only in the
   time of David. The word probably means "runners" or "couriers,"
   and may denote that while forming part of David's bodyguard,
   they were also sometimes employed as couriers (2 Sam. 8:18;
   20:7, 23;1 Kings 1:38, 44; 1 Chr. 18:17). Some, however, think
   that these are the names simply of two Philistine tribes from
   which David selected his body-guard. They are mentioned along
   with the Gittites (2 Sam. 15:18), another body of foreign troops
   whom David gathered round him.
   

Pelethites, judges; destroyers