Erna is a distinctive girls' name in United States, ranking #12971 in 2008 with 8 recorded births. The name reached its all-time peak in 2001 with 14 births ranking #7438. Since 1996, the popularity has increased by 60.0%. In 2008, approximately 1 in every 236,340 girls born was named Erna. STABLE Recent data shows the name is currently stable.