Allegra is a distinctive girls' name in England & Wales, ranking #683 in 2020 with 54 recorded births. The name reached its all-time peak in 2018 with 63 births ranking #641. Since 1996, the popularity has increased by 500.0%. In 2020, approximately 1 in every 4,970 girls born was named Allegra. STABLE Recent data shows the name is currently stable.