forefather (n.)youdaoicibaDictYouDict[forefather 词源字典]
"ancestor," c. 1300, from fore- + father (n.); perhaps modeled on or modified from Old Norse forfaðir. Similar formation in Dutch voorvader, German Vorvater, Danish forfædre (Old English had forð-fæder).[forefather etymology, forefather origin, 英语词源]