c. 1300, "chancellorship;" late 14c., "court of the Lord Chancellor of England," contracted from chancellery (c. 1300), from Old French chancelerie (12c.), from Medieval Latin cancellaria (see chancellor). As in "Bleak House."
Others are reading
<a href="https://www.etymonline.com/word/chancellery">Etymology of chancellery by etymonline</a>
Harper, D. (n.d.). Etymology of chancellery. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/chancellery