US first names, 1940–2025
Random names that start with O
Olivia, Oliver, Owen and more than a thousand rarer O names, paired with real American surnames. Hit generate until one fits.
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About O names
Between 1940 and 2025 the Social Security Administration recorded 835,882 girls across 635 different O names, and 1,139,046 boys across 717.
Each name is drawn with the odds it had in real life, so common names come up often and rare ones now and then. Surnames come from the 2000 U.S. Census and are picked separately. Set realism to 0 under more options and every name becomes equally likely.
More about these names
What the data says
- About 1 in 2 girls with a name starting with O born from 1940 to 2025 got one of just 10 names. Those 10 names hold 83.3% of all recorded girls with a name starting with O.
- Among girls with a name starting with O, names behave like 8 equally common names out of 635 in use (effective number of names).
- The average girl's name starting with O has 5.9 letters.
- About 1 in 2 boys with a name starting with O born from 1940 to 2025 got one of just 10 names. Those 10 names hold 76.4% of all recorded boys with a name starting with O.
- Among boys with a name starting with O, names behave like 23 equally common names out of 717 in use (effective number of names).
- The average boy's name starting with O has 5.1 letters.
- Fastest riser for girls: Oaklynn, from 144 births in 2006 to 2015 to 11,622 in 2016 to 2025.
- Biggest fall for girls: Odalis, from 545 births in 2006 to 2015 to 168 in 2016 to 2025.
- Fastest riser for boys: Oaklen, from 48 births in 2006 to 2015 to 677 in 2016 to 2025.
- Biggest fall for boys: Osbaldo, from 618 births in 2006 to 2015 to 158 in 2016 to 2025.
Girls: Top 20 names
| # | Name | Births | Share |
|---|---|---|---|
| 1 | Olivia | 551,604 | 65.99% |
| 2 | Olga | 25,135 | 3.01% |
| 3 | Olive | 24,944 | 2.98% |
| 4 | Octavia | 20,622 | 2.47% |
| 5 | Ophelia | 15,459 | 1.85% |
| 6 | Oakley | 15,298 | 1.83% |
| 7 | Opal | 14,331 | 1.71% |
| 8 | Oaklynn | 11,766 | 1.41% |
| 9 | Ora | 8,498 | 1.02% |
| 10 | Ollie | 8,460 | 1.01% |
| 11 | Odessa | 7,034 | 0.84% |
| 12 | Ofelia | 6,538 | 0.78% |
| 13 | Ola | 5,766 | 0.69% |
| 14 | Oaklee | 5,576 | 0.67% |
| 15 | Oaklyn | 5,027 | 0.60% |
| 16 | Oralia | 4,586 | 0.55% |
| 17 | Oakleigh | 4,121 | 0.49% |
| 18 | Oriana | 3,883 | 0.46% |
| 19 | Ocean | 3,822 | 0.46% |
| 20 | Odette | 3,455 | 0.41% |
Boys: Top 20 names
| # | Name | Births | Share |
|---|---|---|---|
| 1 | Oliver | 237,227 | 20.83% |
| 2 | Owen | 229,316 | 20.13% |
| 3 | Oscar | 153,005 | 13.43% |
| 4 | Omar | 104,068 | 9.14% |
| 5 | Orlando | 45,312 | 3.98% |
| 6 | Otis | 32,990 | 2.90% |
| 7 | Orion | 22,373 | 1.96% |
| 8 | Otto | 18,718 | 1.64% |
| 9 | Osvaldo | 14,508 | 1.27% |
| 10 | Omari | 13,158 | 1.16% |
| 11 | Odin | 13,100 | 1.15% |
| 12 | Octavio | 10,956 | 0.96% |
| 13 | Oakley | 10,247 | 0.90% |
| 14 | Orville | 8,767 | 0.77% |
| 15 | Ollie | 7,638 | 0.67% |
| 16 | Odell | 7,090 | 0.62% |
| 17 | Onyx | 6,849 | 0.60% |
| 18 | Oren | 6,001 | 0.53% |
| 19 | Oswaldo | 5,839 | 0.51% |
| 20 | Olin | 5,148 | 0.45% |
Girls: 2006 to 2015 → 2016 to 2025
Rising fastest
- Oaklynn 144 → 11,622
- Oaklyn 158 → 4,869
- Ottilie 32 → 380
- Oakleigh 368 → 3,745
- Octavia 1,014 → 8,945
Falling fastest
- Odalis 545 → 168
- Oliviah 425 → 196
- Odalys 682 → 332
- Olyvia 1,052 → 603
- Olga 887 → 523
Boys: 2006 to 2015 → 2016 to 2025
Rising fastest
- Oaklen 48 → 677
- Onyx 649 → 5,986
- Osiah 37 → 304
- Opie 48 → 354
- Oakland 165 → 1,182
Falling fastest
- Osbaldo 618 → 158
- Oswaldo 1,650 → 472
- Osvaldo 3,455 → 1,393
- Omarion 1,366 → 558
- Orlando 6,300 → 3,382
Questions and answers
What was the most common girl's name starting with O from 1940 to 2025?
Olivia. 551,604 girls received it, 65.99% of all recorded girls born from 1940 to 2025 with a name starting with O.
What was the most common boy's name starting with O from 1940 to 2025?
Oliver. 237,227 boys received it, 20.83% of all recorded boys born from 1940 to 2025 with a name starting with O.
How concentrated are names from 1940 to 2025?
Among girls with a name starting with O the 10 most common names cover 83.3% of births; among boys with a name starting with O 76.4%. In this period girls' names were the more concentrated set.
What share of babies get a name starting with O?
Across 1940 to 2025, 0.6% of recorded births had a first name starting with O.
Which names grew fastest compared with 2006 to 2015?
Among names with at least 300 births in 2016 to 2025, the biggest gains were for girls, Oaklynn (144 births in 2006 to 2015, 11,622 in 2016 to 2025); for boys, Oaklen (48 births in 2006 to 2015, 677 in 2016 to 2025).