Marykathryn is a distinctive girls' name in United States, ranking #13841 in 2016 with 7 recorded births. The name reached its all-time peak in 2000 with 20 births ranking #5617. Since 1996, the popularity has decreased by 61.1%. In 2016, approximately 1 in every 253,070 girls born was named Marykathryn. FALLING Recent data shows the name is currently falling.