Isadore is a distinctive girls' name in United States, ranking #13255 in 2017 with 7 recorded births. This places Isadore in the bottom 28% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2014 with 9 births ranking #11339. In 2017, approximately 1 in every 246,554 girls born was named Isadore. STABLE Recent data shows the name is currently stable.