Petra is a distinctive girls' name in United States, ranking #2025 in 2010 with 99 recorded births. The name reached its all-time peak in 2015 with 176 births ranking #1351. Since 1996, the popularity has increased by 16.5%. In 2010, approximately 1 in every 17,953 girls born was named Petra. STABLE Recent data shows the name is currently stable.