The story
- Irish · derived fromfiach“raven”
- French · borrowed fromfiacre
- English todayfiacre
Borrowed from French fiacre. From Hôtel de Saint Fiacre, a tavern in Paris operating a horse-carriage service from the 1640s, itself named after the Irish Saint Fiacre (c. 600–670 CE), perhaps from Irish fiach (“raven”).
Etymology from Wiktionary, CC BY-SA 4.0.