Kainalu is a rare boys' name that peaked in 2003 and has grown less common since.
Kainalu is a boy name. In 2025 it ranked #5,997 for boy births in the United States (and #12,604 across all names), given to 15 babies. Kainalu first appears in 1991 and peaked in 2003 (32 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 15 | 15 | #5,997 |
| 2024 | 20 | 20 | #4,972 |
| 2023 | 19 | 19 | #5,161 |
| 2022 | 18 | 18 | #5,318 |
| 2021 | 18 | 18 | #5,233 |
| 2020 | 20 | 20 | #4,783 |
| 2019 | 15 | 15 | #5,959 |
| 2018 | 18 | 18 | #5,203 |
| 2017 | 23 | 23 | #4,396 |
| 2016 | 16 | 16 | #5,673 |
| 2015 | 18 | 18 | #5,172 |
| 2014 | 18 | 18 | #5,161 |
| 2013 | 15 | 15 | #5,794 |
| 2012 | 14 | 14 | #6,145 |
| 2011 | 22 | 22 | #4,434 |
| 2010 | 15 | 15 | #5,887 |
| 2009 | 23 | 23 | #4,363 |
| 2008 | 31 | 31 | #3,527 |
| 2007 | 25 | 25 | #4,068 |
| 2006 | 29 | 29 | #3,563 |
| 2005 | 27 | 27 | #3,574 |
| 2004 | 25 | 25 | #3,697 |
| 2003 | 32 | 32 | #3,022 |
| 2002 | 28 | 28 | #3,227 |
| 2001 | 19 | 19 | #4,211 |
| 2000 | 19 | 19 | #4,137 |
| 1999 | 15 | 15 | #4,651 |
| 1998 | 15 | 15 | #4,524 |
| 1997 | 24 | — | #3,111 |
| 1996 | 17 | — | #3,923 |
| 1995 | 16 | — | #3,961 |
| 1994 | 10 | — | #5,669 |
| 1993 | 12 | — | #4,859 |
| 1992 | 10 | — | #5,440 |
| 1991 | 6 | — | #7,745 |