Marni is a distinctive girls' name in United States, ranking #4987 in 1996 with 20 recorded births. This places Marni in the top 31% 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 1996, approximately 1 in every 87,648 girls born was named Marni. RISING Recent data shows the name is currently rising.