Marilu is a distinctive girls' name in United States, ranking #7022 in 2025 with 16 recorded births. The name reached its all-time peak in 1996 with 54 births ranking #2414. Since 1996, the popularity has decreased by 70.4%. In 2025, approximately 1 in every 100,454 girls born was named Marilu. STABLE Recent data shows the name is currently stable.