Allegra is a distinctive girls' name in United States, ranking #2713 in 2020 with 61 recorded births. The name reached its all-time peak in 1997 with 152 births ranking #1193. Since 1996, the popularity has decreased by 52.7%. In 2020, approximately 1 in every 26,484 girls born was named Allegra. FALLING Recent data shows the name is currently falling.