Ka is a rare variant of Kay that was most common in the 1990s and has all but disappeared.
Ka is predominantly a girl name. It last appears in U.S. records in 2005. Ka first appears in 1962 and peaked in 1990 (65 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2005 | 8 | 8 | — | #8,698 |
| 2004 | 6 | 6 | #15,017 | — |
| 2002 | 9 | 9 | #10,628 | — |
| 2001 | 16 | 16 | #10,512 | #8,744 |
| 2000 | 18 | 18 | #8,848 | #8,656 |
| 1999 | 19 | 19 | #5,528 | — |
| 1998 | 21 | 21 | #5,033 | — |
| 1997 | 24 | — | #5,504 | #8,696 |
| 1996 | 33 | — | #4,376 | #6,246 |
| 1995 | 37 | — | #3,121 | — |
| 1994 | 47 | — | #2,642 | — |
| 1993 | 54 | — | #2,694 | #5,983 |
| 1992 | 58 | — | #2,558 | #5,884 |
| 1991 | 58 | — | #2,494 | #6,227 |
| 1990 | 75 | — | #2,060 | #5,187 |
| 1989 | 63 | — | #2,260 | #5,000 |
| 1988 | 43 | — | #2,823 | #6,840 |
| 1987 | 39 | — | #2,875 | #7,555 |
| 1986 | 44 | — | #2,536 | #7,265 |
| 1985 | 37 | — | #2,890 | #7,064 |
| 1984 | 42 | — | #2,700 | #4,764 |
| 1983 | 46 | — | #2,410 | #5,191 |
| 1982 | 39 | — | #2,729 | #6,855 |
| 1981 | 36 | — | #3,023 | #5,206 |
| 1980 | 13 | — | #5,358 | — |
| 1979 | 9 | — | #6,966 | — |
| 1978 | 7 | — | #8,004 | — |
| 1977 | 6 | — | #8,933 | — |
| 1976 | 5 | — | — | #6,027 |
| 1962 | 5 | — | #7,007 | — |