Isobella is a distinctive girls' name in England & Wales, ranking #601 in 2006 with 56 recorded births. The name reached its all-time peak in 2010 with 96 births ranking #438. Since 1996, the popularity has increased by 273.3%. In 2006, approximately 1 in every 5,344 girls born was named Isobella. FALLING Recent data shows the name is currently falling.