appellee (n.)

early 14c., appelen, originally in the legal sense, to "call" to a higher judge or court, from Anglo-French apeler "to call upon, accuse," Old French apeler "make an appeal" (11c., Modern French appeler), from Latin appellare "to accost, address, appeal to, summon, name," iterative of appellere "to prepare," from ad "to" (see ad-) + pellere "to beat, push, drive" (from PIE root *pel- (5) "to thrust, strike, drive").

Probably a Roman metaphoric extension of a nautical term for "driving a ship toward a particular landing." The popular modern meaning "be attractive or pleasing" is attested from 1907 (appealing in this sense is from 1891), extended from the sense of "address oneself in expectation of a sympathetic response" (1794). Related: Appealed.

word-forming element in legal English (and in imitation of it), representing the Anglo-French -é ending of past participles used as nouns (compare -y (3)). As these sometimes were coupled with agent nouns in -or, the two suffixes came to be used as a pair to denote the initiator and the recipient of an action.

Not to be confused with the French -ée that is a feminine noun ending (as in fiancée), which is from Latin -ata.