Marilu is a distinctive girls' name in United States, ranking #5893 in 2004 with 21 recorded births. The name reached its all-time peak in 1996 with 54 births ranking #2414. Since 1996, the popularity has decreased by 61.1%. In 2004, approximately 1 in every 87,434 girls born was named Marilu. STABLE Recent data shows the name is currently stable.