Allyn is a distinctive girls' name in United States, ranking #12001 in 2025 with 7 recorded births. The name reached its all-time peak in 1999 with 31 births ranking #3810. Since 1996, the popularity has decreased by 61.1%. In 2025, approximately 1 in every 229,610 girls born was named Allyn. FALLING Recent data shows the name is currently falling.