Isadore is a distinctive boys' name in United States, ranking #5963 in 2025 with 15 recorded births. The name reached its all-time peak in 2020 with 19 births ranking #4924. Since 1996, the popularity has increased by 66.7%. In 2025, approximately 1 in every 113,872 boys born was named Isadore. RISING Recent data shows the name is currently rising.