Petra is a distinctive girls' name in United States, ranking #1516 in 2018 with 144 recorded births. The name reached its all-time peak in 2015 with 176 births ranking #1351. Since 1996, the popularity has increased by 69.4%. In 2018, approximately 1 in every 11,809 girls born was named Petra. STABLE Recent data shows the name is currently stable.