Isadore is a distinctive boys' name in United States, ranking #5613 in 1998 with 11 recorded births. The name reached its all-time peak in 2020 with 19 births ranking #4924. Since 1996, the popularity has increased by 22.2%. In 1998, approximately 1 in every 173,756 boys born was named Isadore. RISING Recent data shows the name is currently rising.