Terrilyn is a distinctive girls' name in United States, ranking #19359 in 2011 with 5 recorded births. This places Terrilyn in the bottom 1% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1997 with 11 births ranking #8302. Since 1996, the popularity has decreased by 16.7%. In 2011, approximately 1 in every 351,761 girls born was named Terrilyn. FALLING Recent data shows the name is currently falling.