amongst (prep.)youdaoicibaDictYouDict[amongst 词源字典]
mid-13c., amonges, from among with adverbial genitive. Parasitic -t first attested 16c. (see amidst). It is well established in the south of England, but not much heard in the north. By similar evolutions, alongst also existed in Middle English.[amongst etymology, amongst origin, 英语词源]