Marilu is a distinctive girls' name in United States, ranking #6070 in 2011 with 22 recorded births. The name reached its all-time peak in 1996 with 54 births ranking #2414. Since 1996, the popularity has decreased by 59.3%. In 2011, approximately 1 in every 79,946 girls born was named Marilu. STABLE Recent data shows the name is currently stable.