Names starting
with O.

O is a round back vowel that gives names a warm, formal weight. Our database lists 9 given names that begin with it — 4 for girls and 5 for boys.

At the top of each list, Olivia (#11874 in 2023) leads the girls while Oliver (#3) leads the boys.

The most-used O names on this page draw from Latin, Greek, Welsh traditions, which is roughly the cultural footprint you'd expect from U.S. naming patterns.

The boy/girl split for O is fairly even, with neither side dominating.