Ko is a very rare variant of Koa that peaked in 2016 and has since faded.
Ko is predominantly a boy name. It last appears in U.S. records in 2021. Ko first appears in 1985 and peaked in 2016 (8 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2021 | 6 | 6 | — | #11,535 |
| 2020 | 7 | 7 | — | #10,142 |
| 2019 | 5 | 5 | — | #13,233 |
| 2016 | 8 | 8 | — | #9,328 |
| 2015 | 5 | 5 | — | #13,169 |
| 2011 | 5 | 5 | — | #13,457 |
| 2010 | 5 | 5 | — | #13,409 |
| 2008 | 5 | 5 | — | #13,692 |
| 1993 | 5 | — | #14,645 | — |
| 1992 | 5 | — | — | #9,200 |
| 1991 | 7 | — | — | #6,947 |
| 1990 | 7 | — | — | #6,843 |
| 1989 | 5 | — | — | #8,635 |
| 1988 | 5 | — | #12,836 | — |
| 1985 | 5 | — | — | #7,108 |