pennoncel
A small pennon (a thin flag or streamer).
historical
Where the raiding parties had once streamed along the highways with fluttering pennoncels, now there were merry bands of pilgrims telling each other dirty stories on the way to Canterbury.
Where it comes from
From Middle English penoncel, from Old French penuncel, diminutive of penon (“pennon”). See pennon, pennant. By surface analysis, pen + French -on (“diminutive”) + Old French -cel (“diminutive”).
Adapted from the Wiktionary entry pennoncel (CC BY-SA 4.0).