protectorate (n.)youdaoicibaDictYouDict[protectorate 词源字典]
1690s in reference to the government by the Cromwells; 1795 as "occupied territory of another nation," from protector + -ate (1). Meaning "state or territory (usually tribal) placed under the protection of a major power" is from 1860.[protectorate etymology, protectorate origin, 英语词源]