Marni is a distinctive girls' name in United States, ranking #4718 in 2025 with 29 recorded births. This places Marni in the top 27% 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. Since 1996, the popularity has increased by 45.0%. In 2025, approximately 1 in every 55,423 girls born was named Marni. RISING Recent data shows the name is currently rising.