Dagny is a distinctive girls' name in United States, ranking #5999 in 2000 with 18 recorded births. The name reached its all-time peak in 2013 with 81 births ranking #2288. Since 1996, the popularity has increased by 80.0%. In 2000, approximately 1 in every 100,887 girls born was named Dagny. FALLING Recent data shows the name is currently falling.