Boy names starting with O
83 boy names starting with O were given in 2025, most popular first, with the number of baby boys. Oliver leads with 14,939.
- Oliver 14,939
- Owen 7,190
- Oscar 1,620
- Omar 1,333
- Otto 1,241
- Orion 1,012
- Onyx 881
- Odin 604
- Ozzy 548
- Otis 422
- Omari 397
- Ozias 381
- Ocean 375
- Orlando 275
- Oziel 229
- Ollie 207
- Osiris 200
- Osman 181
- Oren 174
- Oakland 160
- Octavio 154
- Osvaldo 130
- Orson 126
- Ozzie 123
- Osiel 123
- Obadiah 104
- Oskar 93
- Orhan 92
- Oziah 87
- Olin 86
- Orin 85
- Oslo 78
- Ori 76
- Oden 74
- Obed 72
- Octavius 72
- Omer 70
- Oswald 67
- Om 66
- Olsen 66
- Orrin 62
- Oaklen 62
- Osmar 59
- Oak 59
- Oshea 54
- Osiah 54
- Omarion 52
- Olivier 52
- Octavian 51
- Othniel 47
- Ojas 46
- Odysseus 44
- Oswaldo 41
- Oseias 40
- Oryan 36
- Olen 33
- Oz 33
- Omri 32
- Ousmane 31
- Ollivander 30
- Opie 29
- Omega 27
- Ovidio 24
- Odell 23
- Osborne 22
- Orlin 22
- Ole 21
- Oran 19
- Odie 17
- Octavious 17
- Owyn 16
- Odis 15
- Ottis 15
- Otoniel 15
- Orville 14
- Osbaldo 14
- Olan 14
- Orie 11
- Obie 10
- Oneil 7
- Oneal 6
- Olaf 5
- Ozell 5
Older boy names starting with O
Not given to 5 or more boys in 2025, sorted by how many babies have had the name since 1880.