fane (n.)youdaoicibaDictYouDict
"weathercock," late 14c., from Old English fana "flag, banner," from Proto-Germanic *fanon (cognates: Old Frisian fana, Gothic fana "piece of cloth," Old High German fano, German Fahne "flag, standard"); possibly cognate with Latin pannus "piece of cloth" (see pane).
weather-vane (n.)youdaoicibaDictYouDict
also weathervane, mid-15c., wederfane; see weather (n.) + vane. Weathercock also is mid-15c. (wedurkoke).