Marylou is a distinctive girls' name in United States, ranking #6276 in 2006 with 21 recorded births. The name reached its all-time peak in 1996 with 38 births ranking #3125. Since 1996, the popularity has decreased by 44.7%. In 2006, approximately 1 in every 90,527 girls born was named Marylou. RISING Recent data shows the name is currently rising.