Dagny is a distinctive girls' name in United States, ranking #4734 in 2005 with 28 recorded births. This places Dagny in the top 25% 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 180.0%. In 2005, approximately 1 in every 65,989 girls born was named Dagny. FALLING Recent data shows the name is currently falling.