Oona is a distinctive girls' name in United States, ranking #5882 in 2000 with 19 recorded births. This places Oona in the top 33% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2015 with 131 births ranking #1639. In 2000, approximately 1 in every 95,577 girls born was named Oona. FALLING Recent data shows the name is currently falling.