Controller
Middle English (denoting a person who kept a duplicate register of accounts): from Anglo-Norman contrerollour, from contreroller ‘keep a copy of a roll of accounts’ (see control). Compare with comptroller.
wiktionary
From Middle English countreroller, from Anglo-Norman contreroulour and Middle French contreroleur (French contrôleur), from Medieval Latin contrārotulātor, from *contrārotulāre (from which control). Surface analysis control + -er.
etymonline
controller (n.)
late 14c., "official in charge of accounts in a king's household," from Anglo-French contrerolleour (late 13c.), Old French contrerelleor (Modern French contrôleur), from Medieval Latin contrarotulator, agent noun from *contra-rotulare (see control (v.)).
Broader sense of "officer who examines accounts and manages finances of a corporation or institution" is from c. 1400. The first syllable was confused with count (v.), Latin comptus (hence comptroller). Mechanical sense "that which governs or restrains" is from 1867.
