Obrien is a distinctive boys' name in United States, ranking #10558 in 2022 with 7 recorded births. This places Obrien in the bottom 26% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2005 with 11 births ranking #6983. In 2022, approximately 1 in every 249,196 boys born was named Obrien. FALLING Recent data shows the name is currently falling.