Allegra is a distinctive girls' name in United States, ranking #2293 in 2007 with 84 recorded births. The name reached its all-time peak in 1997 with 152 births ranking #1193. Since 1996, the popularity has decreased by 34.9%. In 2007, approximately 1 in every 22,886 girls born was named Allegra. FALLING Recent data shows the name is currently falling.