Dog Names That Start With O
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About this list
Female dog names that start with O currently in the Top 100 dog names include Olive and Oakley. Dog names currently trending on Nameberry include Ophelia, Ottilie, and Olivia. Unique female dog names that start with O include Orla, Ocean, and Oona.
Male dog names that start with O in the Top 100 dog names include Oliver, Ollie, Otis, Oscar, Oreo, Odin, Oakley, and Ozzy. Dog names currently trending on Nameberry include Otto, Owen, and Orion. Unique male dog names that start with O include Orson, Olaf, and Odyssey.
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The names
Olivia
Latin
"olive tree"
Olivia, a lovely Shakespearean name with an admirable balance of strength and femininity, is one of the top girls' names around the world. 2025 marked its 7th consecutive year in the #1 spot in the…
Oliver
Germanic, Latin
"elf army; ancestor's relic; olive tree"
Oliver is an international star, ranking near the top of the charts throughout the English-speaking world and in a host of European and Latin American countries, from Norway to Chile, Slovenia to…
Owen
Welsh
"young warrior; well-born"
Owen, a resonant Celtic name, has ranked among the Top 100 boys' names in the US for 20 years and is now at its highest point ever. Why do so many parents love Owen? It's a classic with a genuine…
Oaklynn
American invented name
"oak lake"
Many names relating to oak as in the tree are becoming more popular for baby girls, including Oaklynn, more popular than twin Oaklyn three to one. About 1800 baby girls were named Oaklynn versus 600…
Oakley
English
"oak wood or clearing"
Oakley, with its nature name roots and its Annie Oakley charm, is a hot name for both genders but more than twice as popular for girls. This name made it into the Top 1000 for the first time in 2013,…
Olive
English, from Latin, nature name
"olive tree"
Though greatly overshadowed by the trendy Olivia, Olive has a quiet, subtle appeal of its own -- and is now enjoying a remarkable comeback. Olive is one of only four girl names starting with O on the…
Oscar
English or Irish
"God spear, or deer-lover or champion warrior"
Oscar is one of the most stylish Old Man Names of our era. While it's softened slightly in popularity over the past 20 years, that may be considered a very good thing. In the nineties and the…
Omar
Arabic, Hebrew
"flourishing, thriving; eloquent"
A multicultural choice with an appealing open O sound, Omar blends stately strength with familiarity. Also transcribed as Umar, it is a popular choice among Muslim families and features in the name…
Ophelia
Greek
"help"
Floral, elegant, and bold, Ophelia re-entered the US Top 1000 in 2015 after more than 50 years off the charts. It has risen more than 700 spots since then and shows no signs of slowing down. Now in…
Otto
German
"wealthy"
Otto is cool again. Long a quintessential Old Man Name, Otto has been promoted to trending darling of adventurous baby namers. Like most German names , Otto fell out of favor during and after the two…