proprietor (n.)youdaoicibaDictYouDict[proprietor 词源字典]
1630s, "owner, by royal grant, of an American colony," probably from proprietary (n.) in sense "property owner" (late 15c., see proprietary). In general sense of "one who holds something as property" it is attested from 1640s.[proprietor etymology, proprietor origin, 英语词源]