Allegra is a distinctive girls' name in England & Wales, ranking #694 in 2023 with 52 recorded births. The name reached its all-time peak in 2018 with 63 births ranking #641. Since 1996, the popularity has increased by 477.8%. In 2023, approximately 1 in every 4,934 girls born was named Allegra. STABLE Recent data shows the name is currently stable.