Isobelle is a moderately popular girls' name in England & Wales, ranking #332 in 2012 with 146 recorded births. This places Isobelle in the top 4% of ranked UK girls' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2009 with 181 births ranking #265. Since 1996, the popularity has increased by 231.8%. In 2012, approximately 1 in every 2,206 girls born was named Isobelle. FALLING Recent data shows the name is currently falling.