“But process, as we are now to consider it, is the method taken by the law to compel a compliance with the original writ, of which the primary step is by giving the party notice to obey it. This notice is given … by summons; which is a warning to appear in court … given to the defendant by two of the sheriff’s messengers called summoners, either in person or left at his house or land.” 3 William Blackstone, Commentaries on the Laws of England 279 (1768).
summoner
summoner. Hist. A petty officer charged with summoning parties to appear in court. See NUNTIUS(3).