Isobella is a distinctive girls' name in England & Wales, ranking #653 in 2003 with 44 recorded births. The name reached its all-time peak in 2010 with 96 births ranking #438. Since 1996, the popularity has increased by 193.3%. In 2003, approximately 1 in every 6,333 girls born was named Isobella. FALLING Recent data shows the name is currently falling.