Warnell is a very rare boys' name that was most common in the 1920s and has all but disappeared.
Warnell is predominantly a boy name. It last appears in U.S. records in 1986. Warnell first appears in 1918 and peaked in 1962 (12 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 1986 | 6 | — | — | #6,699 |
| 1980 | 5 | — | — | #7,265 |
| 1973 | 5 | — | — | #5,857 |
| 1971 | 5 | — | — | #5,636 |
| 1968 | 5 | — | — | #4,735 |
| 1966 | 8 | — | — | #3,242 |
| 1962 | 12 | — | — | #2,498 |
| 1961 | 8 | — | — | #3,345 |
| 1960 | 7 | — | — | #3,655 |
| 1957 | 5 | — | — | #4,537 |
| 1955 | 7 | — | — | #3,494 |
| 1954 | 6 | — | — | #3,812 |
| 1952 | 6 | — | #5,545 | — |
| 1951 | 6 | — | — | #3,697 |
| 1950 | 5 | — | — | #4,177 |
| 1949 | 9 | — | — | #2,796 |
| 1945 | 5 | — | — | #3,764 |
| 1943 | 5 | — | — | #4,020 |
| 1939 | 9 | — | — | #2,603 |
| 1933 | 6 | — | — | #3,630 |
| 1932 | 7 | — | — | #3,352 |
| 1930 | 8 | — | — | #3,280 |
| 1926 | 5 | — | — | #4,811 |
| 1923 | 12 | — | #5,717 | #3,811 |
| 1921 | 5 | — | — | #4,951 |
| 1920 | 5 | — | #5,734 | — |
| 1918 | 5 | — | — | #4,786 |