Marykathryn is a distinctive girls' name in United States, ranking #17522 in 2017 with 5 recorded births. The name reached its all-time peak in 2000 with 20 births ranking #5617. Since 1996, the popularity has decreased by 72.2%. In 2017, approximately 1 in every 345,176 girls born was named Marykathryn. FALLING Recent data shows the name is currently falling.