earthling (n.)youdaoicibaDictYouDict[earthling 词源字典]
Old English yrþling "plowman" (see earth + -ling); the sense of "inhabitant of the earth" is from 1590s and might be a re-formation, as the word seems to be missing in Middle English. Compare earthman. Earlier in this sense was earthite (1825).[earthling etymology, earthling origin, 英语词源]