Isabeau is a distinctive girls' name in United States, ranking #8823 in 2011 with 13 recorded births. The name reached its all-time peak in 2013 with 25 births ranking #5381. Since 1996, the popularity has decreased by 18.8%. In 2011, approximately 1 in every 135,293 girls born was named Isabeau. STABLE Recent data shows the name is currently stable.