Isidore is a distinctive boys' name in United States, ranking #9505 in 2005 with 7 recorded births. The name reached its all-time peak in 2023 with 34 births ranking #3443. Since 1996, the popularity has increased by 40.0%. In 2005, approximately 1 in every 285,307 boys born was named Isidore. STABLE Recent data shows the name is currently stable.