Marylou is a distinctive girls' name in United States, ranking #5204 in 2023 with 25 recorded births. The name reached its all-time peak in 1996 with 38 births ranking #3125. Since 1996, the popularity has decreased by 34.2%. In 2023, approximately 1 in every 64,106 girls born was named Marylou. RISING Recent data shows the name is currently rising.