Marilu is a distinctive girls' name in United States, ranking #4228 in 2006 with 35 recorded births. The name reached its all-time peak in 1996 with 54 births ranking #2414. Since 1996, the popularity has decreased by 35.2%. In 2006, approximately 1 in every 54,316 girls born was named Marilu. STABLE Recent data shows the name is currently stable.