Mennonite (n.)youdaoicibaDictYouDict[Mennonite 词源字典]
member of an Anabaptist sect, 1560s, from name of Menno Simons (1492-1559), founder of the sect in Friesland, + -ite (1). As an adjective by 1727. Alternative form Mennonist (n.) attested from 1640s.[Mennonite etymology, Mennonite origin, 英语词源]