Allegra is a distinctive girls' name in United States, ranking #2171 in 2008 with 92 recorded births. The name reached its all-time peak in 1997 with 152 births ranking #1193. Since 1996, the popularity has decreased by 28.7%. In 2008, approximately 1 in every 20,551 girls born was named Allegra. FALLING Recent data shows the name is currently falling.