Marykathryn is a distinctive girls' name in United States, ranking #8556 in 2004 with 13 recorded births. The name reached its all-time peak in 2000 with 20 births ranking #5617. Since 1996, the popularity has decreased by 27.8%. In 2004, approximately 1 in every 141,240 girls born was named Marykathryn. FALLING Recent data shows the name is currently falling.