Gwennyth is a distinctive girls' name in United States, ranking #11480 in 2002 with 8 recorded births. This places Gwennyth in the bottom 37% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2002 with 8 births ranking #11480. In 2002, approximately 1 in every 224,603 girls born was named Gwennyth. FALLING Recent data shows the name is currently falling.