Marilou is a distinctive girls' name in United States, ranking #11116 in 2018 with 9 recorded births. The name reached its all-time peak in 1996 with 14 births ranking #6607. Since 1996, the popularity has decreased by 35.7%. In 2018, approximately 1 in every 188,936 girls born was named Marilou. RISING Recent data shows the name is currently rising.