Isobelle is a distinctive girls' name in England & Wales, ranking #585 in 2016 with 72 recorded births. The name reached its all-time peak in 2009 with 181 births ranking #265. Since 1996, the popularity has increased by 63.6%. In 2016, approximately 1 in every 4,266 girls born was named Isobelle. FALLING Recent data shows the name is currently falling.