Isobella is a distinctive girls' name in England & Wales, ranking #525 in 2009 with 76 recorded births. The name reached its all-time peak in 2010 with 96 births ranking #438. Since 1996, the popularity has increased by 406.7%. In 2009, approximately 1 in every 4,123 girls born was named Isobella. FALLING Recent data shows the name is currently falling.