Dagny is a distinctive girls' name in United States, ranking #3399 in 2015 with 47 recorded births. This places Dagny in the top 18% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2013 with 81 births ranking #2288. Since 1996, the popularity has increased by 370.0%. In 2015, approximately 1 in every 37,971 girls born was named Dagny. FALLING Recent data shows the name is currently falling.