Isadore is a distinctive boys' name in United States, ranking #5795 in 1999 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 1999, approximately 1 in every 174,553 boys born was named Isadore. RISING Recent data shows the name is currently rising.