Marykathryn is a distinctive girls' name in United States, ranking #6854 in 2001 with 16 recorded births. The name reached its all-time peak in 2000 with 20 births ranking #5617. Since 1996, the popularity has decreased by 11.1%. In 2001, approximately 1 in every 112,535 girls born was named Marykathryn. FALLING Recent data shows the name is currently falling.