Русско-англо-русский юридический словарь

Chancellor (Latin: cancellarius) is a title of various official positions in the governments of many nations. The original chancellors were the cancellarii of Roman courts of justice—ushers, who sat at the cancelli or lattice work screens of a basilica or law court, which separated the judge and counsel from the audience. A chancellor's office is called a chancellery or chancery. The word is now used in the titles of many various officers in all kinds of settings (government, education, religion). (Wikipedia)

Chancellor is the title of the head of government in Germany and Austria. (COBUILD Advanced English Dictionary)

German Chancellor Angela Merkel’s chosen successor resigned Monday, shaking up German politics and throwing Merkel’s legacy into question. (Vox)