Isabeau is a distinctive girls' name in United States, ranking #13866 in 2025 with 6 recorded births. The name reached its all-time peak in 2013 with 25 births ranking #5381. Since 1996, the popularity has decreased by 62.5%. In 2025, approximately 1 in every 267,878 girls born was named Isabeau. STABLE Recent data shows the name is currently stable.