Marilou is a distinctive girls' name in United States, ranking #14525 in 2023 with 6 recorded births. The name reached its all-time peak in 1996 with 14 births ranking #6607. Since 1996, the popularity has decreased by 57.1%. In 2023, approximately 1 in every 267,108 girls born was named Marilou. RISING Recent data shows the name is currently rising.