Isobelle is a distinctive girls' name in United States, ranking #12289 in 2000 with 7 recorded births. This places Isobelle in the bottom 30% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2008 with 8 births ranking #13057. In 2000, approximately 1 in every 259,425 girls born was named Isobelle. STABLE Recent data shows the name is currently stable.