Allegra is a distinctive girls' name in England & Wales, ranking #1004 in 2006 with 28 recorded births. The name reached its all-time peak in 2018 with 63 births ranking #641. Since 1996, the popularity has increased by 211.1%. In 2006, approximately 1 in every 10,687 girls born was named Allegra. STABLE Recent data shows the name is currently stable.