Marylou is a distinctive girls' name in United States, ranking #9589 in 2018 with 11 recorded births. The name reached its all-time peak in 1996 with 38 births ranking #3125. Since 1996, the popularity has decreased by 71.1%. In 2018, approximately 1 in every 154,584 girls born was named Marylou. RISING Recent data shows the name is currently rising.