Noble

Noble is a state-privileged status which is generally hereditary. Titles of nobility are usually associated with present or former monarchies. The term originally referred to those who were "known" or "notable" and was applied to the highest social class in pre-modern societies.

One Piece
Nobles are not to be confused with World Nobles as nobles are people restricted to their repective kingdoms while the World Nobles are people who were decendents from the Twenty Kingdoms and live only in Mariejois. Yet there haven't been any nobles shown in the series until chapter 584. However, the nobles shown in the series so far was shown to be heartless as they decided to have Gray Terminal burned to make the kingdom beautiful for the visiting World Nobles.

Notable Nobles

 * Sabo
 * Sterry
 * Sabo's Father
 * Sabo's Mother