Marilu is a distinctive girls' name in United States, ranking #3853 in 1999 with 31 recorded births. The name reached its all-time peak in 1996 with 54 births ranking #2414. Since 1996, the popularity has decreased by 42.6%. In 1999, approximately 1 in every 57,219 girls born was named Marilu. STABLE Recent data shows the name is currently stable.