Boy Names Ending In O
Boys' names ending in O, ranked by how many babies actually got them — not by editorial preference — plus which ones are climbing and how the ending itself has moved.
- Share of boys, 2025
- 7.7%
- vs 4.1% in 2000
- Names in use
- 857
- 2,497 recorded since 1880
- Ending peaked
- 2025
- at 7.7% of names
- Rank among 26 last letters
- #4
- by 2025 share
How O has fared since 1880
Share of all listed U.S. births given a name ending in O, year by year. Plotted as a share rather than a count — raw counts track how many babies were born, so every ending would appear to peak in 1957.
| Save name | Name & meaning | History 1926–2025, yearly counts; individually scaled | Babies 2025 · rank | 5-year rank movement | Peak year |
|---|---|---|---|---|---|
| 2,058#176 | Up 4 rank positions in five years | 1997 | |||
| 8,173#19 | Up 17 rank positions in five years | 2022 | |||
| 721#438 | Down 109 rank positions in five years | 1980 | |||
| 1,842#195 | Up 17 rank positions in five years | 2001 | |||
| 833#380 | Down 41 rank positions in five years | 1998 | |||
| 1,069#322 | Down 26 rank positions in five years | 1993 | |||
| 11,045#8 | Up 12 rank positions in five years | 2024 | |||
| 2,351#158 | Down 32 rank positions in five years | 2006 | |||
| 778#410 | Down 82 rank positions in five years | 2001 | |||
| 7,554#26 | Up 45 rank positions in five years | 2025 | |||
| 819#387 | Down 45 rank positions in five years | 2006 | |||
| 3,789#91 | Down 5 rank positions in five years | 2019 | |||
| 684#455 | Down 44 rank positions in five years | 2000 | |||
| 1,124#304 | Up 10 rank positions in five years | 2007 | |||
| 3,065#117 | Up 35 rank positions in five years | 2025 | |||
| 714#441 | Down 62 rank positions in five years | 1995 | |||
| 862#370 | Up 23 rank positions in five years | 2005 | |||
| 2,397#154 | Up 75 rank positions in five years | 2025 | |||
| 743#430 | Down 45 rank positions in five years | 2006 | |||
| 590#511 | Down 34 rank positions in five years | 2022 | |||
| 2,974#119 | Up 15 rank positions in five years | 2022 | |||
| 3,701#94 | Up 81 rank positions in five years | 2025 | |||
| 1,241#277 | Up 112 rank positions in five years | 2024 | |||
| 837#378 | Up 43 rank positions in five years | 2025 | |||
| 3,945#82 | Up 90 rank positions in five years | 2023 | |||
| 5,835#50 | Up 118 rank positions in five years | 2025 | |||
| 4,556#72 | Up 102 rank positions in five years | 2024 | |||
| 2,455#146 | Up 27 rank positions in five years | 2024 | |||
| 679#459 | Up 33 rank positions in five years | 2009 | |||
| 614#492 | Up 85 rank positions in five years | 2007 | |||
| 1,129#302 | Up 76 rank positions in five years | 2024 | |||
| 2,443#148 | Up 72 rank positions in five years | 2024 | |||
| 1,209#280 | Down 15 rank positions in five years | 2019 | |||
| 2,066#174 | Up 144 rank positions in five years | 2025 | |||
| 1,118#305 | Up 108 rank positions in five years | 2025 | |||
| 698#449 | Up 91 rank positions in five years | 2025 | |||
| 1,046#325 | Up 33 rank positions in five years | 2022 | |||
| 934#353 | Up 92 rank positions in five years | 2025 | |||
| 798#399 | Up 243 rank positions in five years | 2025 | |||
| 608#497 | Up 129 rank positions in five years | 2025 | |||
| 547#550 | Up 238 rank positions in five years | 2025 | |||
| 710#444 | Up 176 rank positions in five years | 2025 | |||
| 1,577#226 | Up 54 rank positions in five years | 2025 | |||
| 785#406 | Up 240 rank positions in five years | 2025 | |||
| 965#341 | Up 7 rank positions in five years | 2022 | |||
| 708#445 | Up 3 rank positions in five years | 2022 | |||
| 753#427 | Up 277 rank positions in five years | 2024 | |||
| 563#532 | Up 242 rank positions in five years | 2024 | |||
| 797#402 | Up 47 rank positions in five years | 2024 | |||
| 818#388 | Up 690 rank positions in five years | 2025 |
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O names climbing fastest
Biggest O names of all time
By total applications since 1880 — a different list from the one above, because it counts every generation, not just this one.
Every other ending
Sources & methodology
Rankings and counts come from official birth card-application data, 1880–2025. Counts are card applications rather than births, and any name given to fewer than 5 babies of one sex in a year is not published — so “—” means genuinely uncommon, never invalid. The “climbing fastest” row ranks by five-year rank movement as a ratio, and a name must be inside the top 1,000 with at least 200 applications in 2025 to qualify — a looser gate than the site-wide trending list uses, because inside a single ending the stricter one leaves some endings empty. Ending shares are measured over listed names only, and the 25-year comparison is a generation rather than five years because ending fashion moves far more slowly than any one name.