Noel (n.)youdaoicibaDictYouDict[Noel 词源字典]
late 14c., nowel "feast of Christmas," from Old French noel "the Christmas season," variant of nael, from Latin natalis (dies) "birth (day)," in Church Latin in reference to the birthday of Christ, from natus, past participle of nasci "be born" (Old Latin gnasci; see genus). The modern word in English, with the sense "a Christmas carol" (1811) probably is a separate borrowing from French. As a masc. proper name, from Old French, probably literally "of or born on Christmas."[Noel etymology, Noel origin, 英语词源]
Scrooge (n.)youdaoicibaDictYouDict
generic for "miser," 1940, from curmudgeonly character in Dickens' 1843 story "A Christmas Carol." It does not appear to be a genuine English surname, but it is an 18c. variant of scrounge.
WalkeryoudaoicibaDictYouDict
surname, early 13c., probably an agent noun from walk (v.) in the sense "to full cloth." preserves the cloth-fulling sense (walker with this meaning is attested from c. 1300). "Walker" or "Hookey Walker" was a common slang retort of incredulity in early and mid-19c. London, for which "Various problematic explanations have been offered" [Century Dictionary].
"Is it?" said Scrooge. "Go and buy it."
"Walk-ER!" exclaimed the boy.
"No, no," said Scrooge. "I am in earnest" (etc.)
[Dickens, "A Christmas Carol"]