Erna is a distinctive girls' name in United States, ranking #9386 in 2000 with 10 recorded births. The name reached its all-time peak in 2001 with 14 births ranking #7438. Since 1996, the popularity has increased by 100.0%. In 2000, approximately 1 in every 181,597 girls born was named Erna. STABLE Recent data shows the name is currently stable.