Rein is a distinctive girls' name in United States, ranking #12642 in 2016 with 8 recorded births. This places Rein in the bottom 33% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2023 with 15 births ranking #7560. In 2016, approximately 1 in every 221,436 girls born was named Rein. RISING Recent data shows the name is currently rising.