Dagny is a distinctive girls' name in United States, ranking #5627 in 2001 with 20 recorded births. The name reached its all-time peak in 2013 with 81 births ranking #2288. Since 1996, the popularity has increased by 100.0%. In 2001, approximately 1 in every 90,028 girls born was named Dagny. FALLING Recent data shows the name is currently falling.