The name Isabeau is a girl's name of French origin meaning "pledged to God". Isabeau and is often added to lists like Cool Girls' Names—Rare, Unique and Unusual and discussed in our forums with posts like "Names on NB that make you go WOW!".
From the experts:
With Isabel getting so popular, parents are searching for new varieties of the name, and Isabeau is one that makes a lovely French twist.
Isabeau of Bavaria was the wife of King Charles VI of France--and it was possibly a nickname for Elisabeth. It is also the name of an opera by Pietro Mascagni, a retelling of the medieval English legend of Lady Godiva, and in the 1985 film Ladyhawke, Michelle Pfeiffer plays the heroine, Lady Isabeau d'Arjou, who assumes the form of a hawk during the day.