Marylou is a distinctive girls' name in United States, ranking #6087 in 2021 with 20 recorded births. The name reached its all-time peak in 1996 with 38 births ranking #3125. Since 1996, the popularity has decreased by 47.4%. In 2021, approximately 1 in every 81,986 girls born was named Marylou. RISING Recent data shows the name is currently rising.