Isobella is a distinctive girls' name in England & Wales, ranking #519 in 2012 with 82 recorded births. The name reached its all-time peak in 2010 with 96 births ranking #438. Since 1996, the popularity has increased by 446.7%. In 2012, approximately 1 in every 3,928 girls born was named Isobella. FALLING Recent data shows the name is currently falling.