We named this one after Bertrand du Guesclin (1320-1380), Constable of France from 1370 to 1380. He is considered one of the greatest French soldiers of his time and one of the important figures of the Hundred Years' War (1337-1453).
The title constable was usually held by a courtier in charge of keeping the horses of his lord, coming from the Latin "comes stabulari" (count of the stables). The office 'constable' was often held by the person in charge of the defence of a castle -- even today, there is a Constable of the Tower of London. In some countries, such as France, this title developed into a high military rank.
This is a short and handy hand-and-a-half sword with a very stiff blade, primarily for thrusting, but pretty decent for cutting as well. When you handle these swords they are very ready in your hand.
One of the quickest types there is, it follows your intentions at quicksilver like speed. Because of the very narrow point the spine can be made quite thick without the blade becoming cumbersome. This makes for superior stiffness and a very effective thrust.