Petra is a distinctive girls' name in United States, ranking #1920 in 2001 with 91 recorded births. This places Petra in the top 11% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2015 with 176 births ranking #1351. In 2001, approximately 1 in every 19,786 girls born was named Petra. STABLE Recent data shows the name is currently stable.