Names starting with O: Oswaldo to Ozzy
206 first names from SSA's national file, part 5 of 5 of the O directory. 70 link to their full record; for the other 136, the row is NameAlmanac's record: the babies given the name since 1880, the years SSA recorded it (5 or more babies of one sex in a year), its peak year and its 2025 births.
Names: SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data. SSA lists a name in a year only when 5 or more babies of one sex got it.
Oswaldo to Ozzy
| Name | Given to | Babies since 1880 | On record | Peak year | Babies in 2025 |
|---|---|---|---|---|---|
| Oswaldo | Boys | 5,902 | 1915-2025, 90 years | 2006 | 41 |
| Oswell | Boys | 84 | 1894-1928, 12 years | 1917 | under 5 |
| Oswin | Both, 21% girls | 482 | 1916-2025, 27 years | 2018 | 14 |
| Oswyn | Both, 35% girls | 17 | 2013-2022, 3 years | 2013 | under 5 |
| Osyris | Boys | 51 | 2010-2025, 8 years | 2019 | 6 |
| Osyrus | Boys | 10 | 2001-2021, 2 years | 2001 | under 5 |
| Ota | Girls | 215 | 1881-1937, 33 years | 1916 | under 5 |
| Otavia | Girls | 17 | 1985-2002, 3 years | 1991 | under 5 |
| Otavio | Boys | 89 | 2007-2025, 12 years | 2024 | 10 |
| Otavious | Boys | 5 | 1994, 1 year | 1994 | under 5 |
| Oteka | Girls | 5 | 1939, 1 year | 1939 | under 5 |
| Otelia | Girls | 1,184 | 1880-1982, 81 years | 1923 | under 5 |
| Otella | Girls | 50 | 1915-1941, 8 years | 1924 | under 5 |
| Otello | Boys | 6 | 1929, 1 year | 1929 | under 5 |
| Oteria | Girls | 21 | 1918-1983, 4 years | 1918 | under 5 |
| Otey | Boys | 17 | 1917-1929, 3 years | 1923 | under 5 |
| Otha | Both, 18% girls | 7,789 | 1880-2018, 130 years | 1921 | under 5 |
| Othal | Boys | 179 | 1912-1944, 21 years | 1919 | under 5 |
| Othan | Boys | 5 | 1918, 1 year | 1918 | under 5 |
| Othar | Boys | 97 | 1914-1936, 15 years | 1919 | under 5 |
| Othel | Both, 17% girls | 886 | 1906-1968, 52 years | 1921 | under 5 |
| Othelia | Girls | 326 | 1895-1952, 36 years | 1917 | under 5 |
| Othell | Both, 31% girls | 240 | 1915-1983, 30 years | 1924 | under 5 |
| Othella | Girls | 708 | 1889-1973, 56 years | 1921 | under 5 |
| Othello | Both, 14% girls | 803 | 1905-2025, 87 years | 1919 | 8 |
| Other | Boys | 190 | 1909-1935, 23 years | 1916 | under 5 |
| Othie | Boys | 29 | 1912-1947, 5 years | 1916 | under 5 |
| Othman | Boys | 536 | 1977-2025, 37 years | 2022 | 34 |
| Othmar | Boys | 188 | 1912-1932, 18 years | 1916 | under 5 |
| Othniel | Boys | 715 | 1924-2025, 37 years | 2018 | 47 |
| Otho | Boys | 3,328 | 1880-1991, 104 years | 1915 | under 5 |
| Othon | Boys | 70 | 1927-2003, 12 years | 2000 | under 5 |
| Othoniel | Boys | 37 | 1976-2005, 6 years | 1977 | under 5 |
| Othor | Boys | 21 | 1913-1925, 4 years | 1916 | under 5 |
| Otie | Both, 78% girls | 189 | 1883-1942, 28 years | 1915 | under 5 |
| Oties | Boys | 17 | 1922-1924, 3 years | 1922 | under 5 |
| Otila | Girls | 510 | 1894-1974, 53 years | 1924 | under 5 |
| Otilia | Girls | 1,696 | 1893-2025, 122 years | 1935 | 18 |
| Otilio | Boys | 375 | 1925-2024, 58 years | 1978 | under 5 |
| Otilla | Girls | 15 | 1890-1925, 3 years | 1890 | under 5 |
| Otillia | Girls | 160 | 1888-2025, 24 years | 1895 | 8 |
| Otillie | Girls | 26 | 1887-1924, 5 years | 1895 | under 5 |
| Otis | Boys | 61,969 | 1880-2025, 146 years | 1920 | 422 |
| Otisha | Girls | 160 | 1973-2001, 23 years | 1987 | under 5 |
| Otley | Boys | 5 | 1924, 1 year | 1924 | under 5 |
| Otman | Boys | 5 | 1996, 1 year | 1996 | under 5 |
| Otmer | Boys | 16 | 1916-1929, 3 years | 1916 | under 5 |
| Otniel | Boys | 129 | 1980-2024, 19 years | 2018 | under 5 |
| Oto | Boys | 5 | 2021, 1 year | 2021 | under 5 |
| Otome | Girls | 5 | 1921, 1 year | 1921 | under 5 |
| Otoniel | Boys | 1,075 | 1958-2025, 61 years | 1995 | 15 |
| Otsie | Girls | 5 | 1922, 1 year | 1922 | under 5 |
| Ott | Boys | 84 | 1882-1943, 14 years | 1920 | under 5 |
| Otta | Girls | 38 | 1889-1925, 7 years | 1917 | under 5 |
| Ottavia | Girls | 44 | 1993-2025, 7 years | 2022 | 6 |
| Ottavio | Boys | 95 | 1915-2025, 15 years | 1921 | 5 |
| Ottaway | Boys | 5 | 1919, 1 year | 1919 | under 5 |
| Ottelia | Girls | 5 | 1917, 1 year | 1917 | under 5 |
| Otter | Boys | 5 | 2020, 1 year | 2020 | under 5 |
| Ottice | Boys | 15 | 1926-1946, 3 years | 1926 | under 5 |
| Ottie | Both, 68% girls | 1,884 | 1880-2024, 86 years | 1917 | under 5 |
| Ottilia | Girls | 597 | 1880-2025, 60 years | 1891 | 13 |
| Ottilie | Girls | 1,093 | 1880-2025, 68 years | 2024 | 57 |
| Ottillie | Girls | 5 | 1886, 1 year | 1886 | under 5 |
| Ottis | Boys | 4,647 | 1880-2025, 131 years | 1922 | 15 |
| Ottlie | Girls | 6 | 2025, 1 year | 2025 | 6 |
| Ottmar | Boys | 13 | 1992-1993, 2 years | 1993 | under 5 |
| Otto | Boys | 40,015 | 1880-2025, 146 years | 2024 | 1,241 |
| Ottomar | Boys | 5 | 1918, 1 year | 1918 | under 5 |
| Ottoniel | Boys | 22 | 2002-2023, 4 years | 2010 | under 5 |
| Otway | Boys | 5 | 1923, 1 year | 1923 | under 5 |
| Otylia | Girls | 21 | 2012-2017, 4 years | 2012 | under 5 |
| Oudia | Girls | 35 | 1922-1943, 6 years | 1928 | under 5 |
| Ouida | Girls | 4,886 | 1887-1995, 97 years | 1924 | under 5 |
| Ouinton | Boys | 5 | 1980, 1 year | 1980 | under 5 |
| Ouita | Girls | 88 | 1917-1940, 13 years | 1925 | under 5 |
| Oumar | Boys | 761 | 1993-2025, 32 years | 2013 | 38 |
| Oumie | Girls | 8 | 2011, 1 year | 2011 | under 5 |
| Oumou | Girls | 759 | 1996-2025, 30 years | 2013 | 35 |
| Oumy | Girls | 31 | 2001-2020, 6 years | 2014 | under 5 |
| Ourania | Girls | 122 | 1963-2025, 19 years | 1976 | 5 |
| Ourtney | Girls | 5 | 1983, 1 year | 1983 | under 5 |
| Ousainou | Boys | 10 | 2011-2012, 2 years | 2011 | under 5 |
| Ousman | Boys | 360 | 1992-2025, 30 years | 2016 | 9 |
| Ousmane | Boys | 712 | 1993-2025, 32 years | 2023 | 31 |
| Oussama | Boys | 11 | 1997-2025, 2 years | 1997 | 5 |
| Ova | Both, 72% girls | 1,892 | 1881-2023, 78 years | 1918 | under 5 |
| Ovada | Girls | 12 | 1915-1922, 2 years | 1915 | under 5 |
| Ovadia | Boys | 155 | 2011-2025, 14 years | 2017 | 12 |
| Oval | Both, 17% girls | 601 | 1898-1952, 42 years | 1920 | under 5 |
| Ovalee | Girls | 7 | 1919, 1 year | 1919 | under 5 |
| Ovalene | Girls | 6 | 1925, 1 year | 1925 | under 5 |
| Ovaline | Girls | 46 | 1918-1928, 7 years | 1921 | under 5 |
| Ove | Boys | 40 | 1915-1934, 7 years | 1931 | under 5 |
| Oveah | Girls | 10 | 2023, 1 year | 2023 | under 5 |
| Oved | Boys | 60 | 1979-2015, 10 years | 2006 | under 5 |
| Oveda | Girls | 205 | 1913-1963, 27 years | 1922 | under 5 |
| Ovedia | Girls | 11 | 1915-1929, 2 years | 1929 | under 5 |
| Ovee | Girls | 89 | 2014-2025, 11 years | 2018 | 9 |
| Oveida | Girls | 7 | 1927, 1 year | 1927 | under 5 |
| Ovel | Both, 15% girls | 33 | 1914-1926, 6 years | 1918 | under 5 |
| Ovelia | Girls | 65 | 1916-2020, 10 years | 1916 | under 5 |
| Oveline | Girls | 12 | 1918-1931, 2 years | 1918 | under 5 |
| Ovell | Both, 68% girls | 50 | 1910-1935, 8 years | 1919 | under 5 |
| Ovella | Girls | 418 | 1892-1965, 40 years | 1924 | under 5 |
| Ovena | Girls | 6 | 1917, 1 year | 1917 | under 5 |
| Overa | Girls | 28 | 1920-1932, 5 years | 1920 | under 5 |
| Overton | Boys | 544 | 1884-2003, 58 years | 1918 | under 5 |
| Oveta | Girls | 216 | 1915-1964, 32 years | 1953 | under 5 |
| Ovetta | Girls | 118 | 1915-1965, 20 years | 1919 | under 5 |
| Ovey | Boys | 11 | 1924-1925, 2 years | 1925 | under 5 |
| Ovi | Both, 70% girls | 140 | 2015-2025, 11 years | 2025 | 21 |
| Ovia | Girls | 7 | 1924, 1 year | 1924 | under 5 |
| Ovianna | Girls | 5 | 2020, 1 year | 2020 | under 5 |
| Ovid | Boys | 741 | 1886-1989, 64 years | 1915 | under 5 |
| Ovida | Girls | 182 | 1912-1965, 27 years | 1931 | under 5 |
| Ovide | Boys | 140 | 1910-1943, 21 years | 1921 | under 5 |
| Ovidio | Boys | 1,082 | 1920-2025, 94 years | 2024 | 24 |
| Ovie | Both, 43% girls | 854 | 1884-2025, 72 years | 1917 | 9 |
| Ovila | Boys | 240 | 1895-1943, 26 years | 1916 | under 5 |
| Ovin | Boys | 14 | 2021-2022, 2 years | 2021 | under 5 |
| Ovis | Both, 50% girls | 10 | 1916-1918, 2 years | 1916 | under 5 |
| Oviya | Girls | 160 | 2001-2025, 17 years | 2011 | 6 |
| Oviyan | Boys | 5 | 2023, 1 year | 2023 | under 5 |
| Owain | Boys | 151 | 1998-2025, 20 years | 2008 | 7 |
| Owais | Boys | 433 | 1991-2025, 30 years | 2023 | 40 |
| Owan | Boys | 19 | 2006-2019, 3 years | 2006 | under 5 |
| Oweda | Girls | 44 | 1916-1959, 8 years | 1925 | under 5 |
| Owen | Boys | 246,320 | 1880-2025, 146 years | 2016 | 7,223 |
| Owena | Girls | 11 | 1917-1933, 2 years | 1933 | under 5 |
| Owenn | Boys | 73 | 2003-2019, 11 years | 2016 | under 5 |
| Owens | Boys | 745 | 1890-2025, 77 years | 1921 | 12 |
| Oweta | Girls | 10 | 1920-1925, 2 years | 1920 | under 5 |
| Owetta | Girls | 5 | 1975, 1 year | 1975 | under 5 |
| Owin | Boys | 211 | 1999-2025, 22 years | 2013 | 9 |
| Owsley | Both, 17% girls | 30 | 2017-2024, 4 years | 2017 | under 5 |
| Owyn | Boys | 853 | 1997-2025, 28 years | 2015 | 16 |
| Owynn | Both, 34% girls | 245 | 2005-2025, 19 years | 2016 | 12 |
| Oxana | Girls | 21 | 1999-2024, 4 years | 2024 | under 5 |
| Oxford | Boys | 108 | 2013-2025, 12 years | 2020 | 5 |
| Oxley | Boys | 83 | 2015-2025, 9 years | 2016 | 8 |
| Oya | Girls | 44 | 2017-2025, 7 years | 2022 | 6 |
| Oyd | Boys | 5 | 1926, 1 year | 1926 | under 5 |
| Oyindamola | Girls | 95 | 1998-2018, 14 years | 2015 | under 5 |
| Oyinkansola | Girls | 108 | 1996-2025, 16 years | 2016 | 5 |
| Oyinlola | Girls | 5 | 2016, 1 year | 2016 | under 5 |
| Oyku | Girls | 11 | 2021, 1 year | 2021 | under 5 |
| Oysha | Girls | 23 | 2021-2025, 3 years | 2024 | 5 |
| Oyuki | Girls | 164 | 1987-2021, 21 years | 1988 | under 5 |
| Oyuky | Girls | 59 | 1988-2006, 9 years | 1992 | under 5 |
| Oz | Boys | 677 | 1998-2025, 28 years | 2019 | 33 |
| Oza | Both, 86% girls | 180 | 1899-1961, 26 years | 1917 | under 5 |
| Ozai | Boys | 43 | 2019-2025, 6 years | 2024 | 7 |
| Ozair | Boys | 99 | 1994-2025, 13 years | 2022 | 7 |
| Ozais | Boys | 20 | 2021-2023, 3 years | 2023 | under 5 |
| Ozan | Boys | 335 | 1992-2025, 26 years | 2020 | 17 |
| Ozara | Girls | 40 | 2014-2025, 5 years | 2023 | 7 |
| Ozari | Boys | 13 | 2024-2025, 2 years | 2025 | 8 |
| Ozaria | Girls | 15 | 2007-2024, 3 years | 2007 | under 5 |
| Ozeal | Girls | 6 | 1917, 1 year | 1917 | under 5 |
| Ozel | Both, 31% girls | 16 | 1924-1926, 3 years | 1926 | under 5 |
| Ozelia | Girls | 41 | 1907-1934, 7 years | 1919 | under 5 |
| Ozell | Both, 39% girls | 2,841 | 1902-2025, 105 years | 1920 | 5 |
| Ozella | Girls | 2,338 | 1881-2025, 95 years | 1921 | 7 |
| Ozellar | Girls | 10 | 1921-1922, 2 years | 1921 | under 5 |
| Ozelle | Girls | 343 | 1903-1931, 26 years | 1919 | under 5 |
| Ozelma | Girls | 18 | 1903-1926, 3 years | 1903 | under 5 |
| Ozena | Girls | 5 | 1915, 1 year | 1915 | under 5 |
| Ozer | Boys | 5 | 2023, 1 year | 2023 | under 5 |
| Ozetta | Girls | 87 | 1918-1958, 15 years | 1922 | under 5 |
| Ozi | Boys | 6 | 2024, 1 year | 2024 | under 5 |
| Ozia | Boys | 12 | 1930-2025, 2 years | 1930 | 6 |
| Oziah | Boys | 612 | 2006-2025, 19 years | 2025 | 87 |
| Ozian | Boys | 15 | 2024-2025, 2 years | 2024 | 7 |
| Ozias | Boys | 2,066 | 1920-2025, 26 years | 2025 | 381 |
| Ozie | Both, 57% girls | 2,168 | 1888-2010, 87 years | 1924 | under 5 |
| Oziel | Boys | 2,718 | 1963-2025, 54 years | 2025 | 229 |
| Ozil | Boys | 146 | 2010-2025, 15 years | 2012 | 10 |
| Ozioma | Girls | 51 | 1999-2020, 8 years | 2013 | under 5 |
| Ozion | Boys | 37 | 2008-2025, 4 years | 2024 | 12 |
| Oziris | Boys | 5 | 2025, 1 year | 2025 | 5 |
| Ozite | Girls | 10 | 1911-1923, 2 years | 1911 | under 5 |
| Oziyah | Both, 42% girls | 12 | 2025, 1 year | 2025 | 12 |
| Ozkar | Boys | 5 | 2004, 1 year | 2004 | under 5 |
| Ozlem | Girls | 86 | 1968-2025, 8 years | 2022 | 8 |
| Ozlo | Boys | 81 | 2016-2025, 8 years | 2024 | 14 |
| Ozlyn | Girls | 32 | 2020-2025, 5 years | 2020 | 7 |
| Ozlynn | Girls | 55 | 2018-2025, 7 years | 2021 | 10 |
| Ozma | Girls | 8 | 2022, 1 year | 2022 | under 5 |
| Ozman | Boys | 16 | 2020-2024, 3 years | 2020 | under 5 |
| Ozmar | Boys | 36 | 2004-2024, 6 years | 2019 | under 5 |
| Ozni | Boys | 20 | 2020-2024, 3 years | 2024 | under 5 |
| Ozora | Girls | 15 | 2024-2025, 2 years | 2024 | 5 |
| Ozra | Girls | 5 | 2022, 1 year | 2022 | under 5 |
| Ozric | Boys | 14 | 2014-2020, 2 years | 2014 | under 5 |
| Ozriel | Boys | 6 | 2023, 1 year | 2023 | under 5 |
| Ozro | Boys | 66 | 1912-1945, 9 years | 1917 | under 5 |
| Ozvaldo | Boys | 12 | 2005-2024, 2 years | 2005 | under 5 |
| Ozwald | Boys | 28 | 2019-2024, 4 years | 2022 | under 5 |
| Ozymandias | Boys | 55 | 2018-2025, 7 years | 2023 | 5 |
| Ozzi | Both, 49% girls | 59 | 2017-2025, 6 years | 2025 | 17 |
| Ozzie | Both, 23% girls | 4,177 | 1887-2025, 126 years | 2022 | 164 |
| Ozziel | Boys | 81 | 2004-2025, 8 years | 2024 | 17 |
| Ozzlyn | Girls | 35 | 2022-2025, 4 years | 2022 | 9 |
| Ozzlynn | Girls | 25 | 2021-2025, 4 years | 2025 | 10 |
| Ozzy | Boys | 4,534 | 1982-2025, 42 years | 2025 | 618 |
Order: alphabetical by the name as SSA spells it. Given to: the share of girls among all babies given the name.