Allegra is a distinctive girls' name in England & Wales, ranking #1317 in 2002 with 15 recorded births. This places Allegra in the top 24% of ranked UK girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2018 with 63 births ranking #641. Since 1996, the popularity has increased by 66.7%. In 2002, approximately 1 in every 17,824 girls born was named Allegra. STABLE Recent data shows the name is currently stable.