Gwennyth is a distinctive girls' name in United States, ranking #16217 in 2001 with 5 recorded births. This places Gwennyth in the bottom 10% 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 2001, approximately 1 in every 360,112 girls born was named Gwennyth. FALLING Recent data shows the name is currently falling.