Marylou is a distinctive girls' name in United States, ranking #5594 in 2020 with 22 recorded births. The name reached its all-time peak in 1996 with 38 births ranking #3125. Since 1996, the popularity has decreased by 42.1%. In 2020, approximately 1 in every 73,432 girls born was named Marylou. RISING Recent data shows the name is currently rising.