Petra is the feminine form of Peter, from the Greek petra, "rock", the word Jesus used when he named his apostle. It is also the name of the ancient rose-red city carved into the cliffs of Jordan. Common in Germany, the Netherlands and Eastern Europe, Petra has stayed a rare choice in the United States, moving between number 1278, its peak in 2020, and number 1881 in 2000, and standing at number 1372 in 2025.