Marni is a distinctive girls' name in England & Wales, ranking #1255 in 2023 with 26 recorded births. The name reached its all-time peak in 2014 with 48 births ranking #802. Since 1996, the popularity has increased by 333.3%. In 2023, approximately 1 in every 9,868 girls born was named Marni. FALLING Recent data shows the name is currently falling.