Oonagh is a distinctive girls' name in United States, ranking #14853 in 2022 with 6 recorded births. This places Oonagh in the bottom 16% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2017 with 8 births ranking #12456. In 2022, approximately 1 in every 273,127 girls born was named Oonagh. FALLING Recent data shows the name is currently falling.