Erna is a distinctive girls' name in United States, ranking #9040 in 2002 with 11 recorded births. The name reached its all-time peak in 2001 with 14 births ranking #7438. Since 1996, the popularity has increased by 120.0%. In 2002, approximately 1 in every 163,347 girls born was named Erna. STABLE Recent data shows the name is currently stable.