apparitor
noun
ap·par·i·tor ə-ˈper-ə-tər 
-ˈpa-rə
: an official formerly sent to carry out the orders of a magistrate, judge, or court
Word History
Etymology
Middle English aparitor, apparytour "court officer," borrowed from Medieval Latin appāritor "royal official, attendant," going back to Latin, "attendant on a magistrate, servant, clerk," from appāri-, variant stem of appārēre "to be visible, be evident, attend, serve" + -tor, agent suffix — more at appear
First Known Use
15th century, in the meaning defined above