Petra is a distinctive girls' name in United States, ranking #1613 in 2013 with 134 recorded births. The name reached its all-time peak in 2015 with 176 births ranking #1351. Since 1996, the popularity has increased by 57.6%. In 2013, approximately 1 in every 13,093 girls born was named Petra. STABLE Recent data shows the name is currently stable.