Isabeau is a distinctive girls' name in United States, ranking #5750 in 1999 with 18 recorded births. The name reached its all-time peak in 2013 with 25 births ranking #5381. Since 1996, the popularity has increased by 12.5%. In 1999, approximately 1 in every 98,543 girls born was named Isabeau. STABLE Recent data shows the name is currently stable.