Bayard

n. bay horse; something colored reddish-brown (especially an animal)

For more information on the racehorse, see Bayardo (horse) Bayard is a magic bay horse in the legends derived from the chansons de geste, renowned for his spirit, and possessed the supernatural ability to adjust his size to his riders. "Bayard" is the French form; in Italian he is known as Baiardo and in Dutch as Beiaard.
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Noun
1. French soldier said to be fearless and chivalrous (1473-1524)
(synonym) Seigneur de Bayard, Chevalier de Bayard, Pierre Terrail, Pierre de Terrail
(hypernym) soldier

(a.)
Properly, a bay horse, but often any horse. Commonly in the phrase blind bayard, an old blind horse.
  

(a.)
A stupid, clownish fellow.
  

Steed of incredible speed given by Charlemagne to Renaud and the other sons of Aymon. The horse was normally the regular size, but could elongate to accommodate all four brothers.