term:

Elisor

elisor n

[Anglo-French ellisour eslisour, literally, one who selects (jurors in the sheriff's stead), elector, from eslire to select, from Old French, ultimately from Latin eligere to choose, elect]
: a judicial officer appointed to act in the stead of a sheriff when the sheriff and any other authorized official (as a coroner) are unable or unqualified to act

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.