guidon (n.) Look up guidon at Dictionary.com
"small flag," originally one borne by a military unit to direct movements, 1540s, from Middle French guidon (16c.), from Italian guidone "battle standard," from guidare "to direct, guide," from Old Provençal guidar "to guide," from Proto-Germanic *witanan "to look after, guard," from PIE root *weid- "to see" (compare guide (v.)).