Isidore is a distinctive boys' name in United States, ranking #3604 in 2021 with 31 recorded births. This places Isidore in the top 26% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2023 with 34 births ranking #3443. Since 1996, the popularity has increased by 520.0%. In 2021, approximately 1 in every 56,395 boys born was named Isidore. STABLE Recent data shows the name is currently stable.