Petra is a distinctive girls' name in United States, ranking #1278 in 2020 with 175 recorded births. The name reached its all-time peak in 2015 with 176 births ranking #1351. Since 1996, the popularity has increased by 105.9%. In 2020, approximately 1 in every 9,231 girls born was named Petra. STABLE Recent data shows the name is currently stable.