Erna is a distinctive girls' name in United States, ranking #14378 in 2007 with 7 recorded births. The name reached its all-time peak in 2001 with 14 births ranking #7438. Since 1996, the popularity has increased by 40.0%. In 2007, approximately 1 in every 274,635 girls born was named Erna. STABLE Recent data shows the name is currently stable.