Marni is a distinctive girls' name in United States, ranking #5574 in 1999 with 19 recorded births. This places Marni in the top 33% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2025 with 29 births ranking #4718. In 1999, approximately 1 in every 93,357 girls born was named Marni. RISING Recent data shows the name is currently rising.