DICT.TW Dictionary Taiwan

 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