Appointer

to name or assign to a position, an office, or the like; designate:
to appoint a new treasurer; to appoint a judge to the bench.
to determine by authority or agreement; fix; set:
to appoint a time for the meeting.
Law. to designate (a person) to take the benefit of an estate created by a deed or will.
to provide with what is necessary; equip; furnish:
They appointed the house with all the latest devices.
Archaic. to order or establish by decree or command; ordain; constitute:
laws appointed by God.
Obsolete. to point at by way of censure.
Obsolete. to ordain; resolve; determine.
Historical Examples

Diomed, who was rather ceremonious, had appointed a nomenclator, or appointer of places to each guest.
The Last Days of Pompeii Edward George Bulwer-Lytton

Instead of Parliament they will try to rule with judges appointed by the king; they will do everything for their appointer.
Balsamo, The Magician Alexander Dumas

The well-being of the country, with appointer and appointees, becomes a secondary consideration.
The Galaxy, June 1877 Various

verb (mainly transitive)
(also intransitive) to assign officially, as for a position, responsibility, etc: he was appointed manager
to establish by agreement or decree; fix: a time was appointed for the duel
to prescribe or ordain: laws appointed by tribunal
(property law) to nominate (a person), under a power granted in a deed or will, to take an interest in property
to equip with necessary or usual features; furnish: a well-appointed hotel
v.

late 14c., “to decide, resolve; to arrange the time of (a meeting, etc.),” from Anglo-French appointer, Old French apointier “make ready, arrange, settle, place” (12c.), from apointer “duly, fitly,” from phrase à point “to the point,” from a- “to” (see ad-) + point “point,” from Latin punctum (see point (n.)). The ground sense is “to come to a point (about some matter),” therefore “agree, settle.” Meaning “put (someone) in charge” is early 15c. Related: Appointed; appointing.