The name Giselle has its origins in the Germanic language. It is derived from the Old Frankish word "gisil," meaning "bright pledge" or "sacred vow." The name gained popularity in medieval France, where it was spelled as "Gisèle."

One of the earliest recorded instances of the name Giselle can be found in the 8th century. Giselle was the name of a Frankish noblewoman who lived during the reign of Charlemagne. She was known for her charitable works and her dedication to the Christian faith.

In the 11th century, Giselle de Merania, also known as Gisela of Bavaria, was a prominent figure in the Holy Roman Empire. She was the wife of King Stephen I of Hungary and played a significant role in the Christianization of Hungary.

During the 12th century, Giselle de Montfort was a French noblewoman and crusader. She accompanied her husband, Simon de Montfort, on the Albigensian Crusade against the Cathars in southern France.

In the 19th century, the name Giselle gained renewed popularity due to the romantic ballet "Giselle," which premiered in Paris in 1841. The ballet tells the story of a peasant girl named Giselle who falls in love with a nobleman disguised as a villager.

One of the most famous people named Giselle in modern times was Giselle Bundchen, the Brazilian supermodel born in 1980. She has been one of the highest-paid models in the world and has appeared on numerous fashion magazine covers.