Thelonious is a rare boys' name that peaked in 2017 and has grown less common since.
Thelonious is a boy name. In 2025 it ranked #7,144 for boy births in the United States (and #15,014 across all names), given to 12 babies. Thelonious was first reported in SSA data in 1960 and peaked in 2017 (23 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 12 | 12 | #7,144 |
| 2024 | 16 | 16 | #5,871 |
| 2023 | 12 | 12 | #7,255 |
| 2022 | 17 | 17 | #5,609 |
| 2021 | 23 | 23 | #4,481 |
| 2020 | 16 | 16 | #5,672 |
| 2019 | 14 | 14 | #6,374 |
| 2018 | 20 | 20 | #4,903 |
| 2017 | 23 | 23 | #4,448 |
| 2016 | 20 | 20 | #4,923 |
| 2015 | 21 | 21 | #4,687 |
| 2014 | 16 | 16 | #5,694 |
| 2013 | 17 | 17 | #5,376 |
| 2012 | 15 | 15 | #5,962 |
| 2011 | 9 | 9 | #8,686 |
| 2010 | 15 | 15 | #6,004 |
| 2009 | 17 | 17 | #5,528 |
| 2008 | 7 | 7 | #10,921 |
| 2007 | 7 | 7 | #10,786 |
| 2006 | 8 | 8 | #9,488 |
| 2005 | 6 | 6 | #11,326 |
| 2004 | 7 | 7 | #9,833 |
| 2003 | 11 | 11 | #6,676 |
| 2002 | 8 | 8 | #8,369 |
| 2001 | 11 | 11 | #6,403 |
| 2000 | 8 | 8 | #8,131 |
| 1999 | 10 | 10 | #6,476 |
| 1998 | 10 | 10 | #6,260 |
| 1996 | 6 | — | #8,902 |
| 1991 | 5 | — | #9,499 |
| 1990 | 5 | — | #9,364 |
| 1989 | 8 | — | #6,179 |
| 1987 | 6 | — | #6,868 |
| 1975 | 5 | — | #6,253 |
| 1973 | 6 | — | #5,031 |
| 1971 | 8 | — | #3,936 |
| 1970 | 5 | — | #5,372 |
| 1968 | 9 | — | #3,089 |
| 1965 | 10 | — | #2,767 |
| 1964 | 7 | — | #3,572 |
| 1963 | 6 | — | #4,007 |
| 1960 | 5 | — | #4,550 |