principality (n.)youdaoicibaDictYouDict[principality 词源字典]
c. 1300, "position of a prince," from Old French principalite "principal matter; power, sovereignty" (12c., Modern French principauté), from Late Latin principalitatem (nominative principalitas), from principalis (see principal (adj.)). Meaning "region or state ruled by a prince" is attested from c. 1400.[principality etymology, principality origin, 英语词源]