Popularity in the United States (by decade)
Numbers
| Fern (masculine) | Fern (feminine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | - | - | #1481 | 0.008 | ||
| 2010 | - | - | - | - | ||
| 2000 | - | - | - | - | ||
| 1990 | - | - | - | - | ||
| 1980 | - | - | - | - | ||
| 1970 | - | - | - | - | ||
| 1960 | - | - | #1097 | 0.005 | ||
| 1950 | - | - | #620 | 0.011 | ||
| 1940 | - | - | #455 | 0.019 | ||
| 1930 | - | - | #287 | 0.041 | ||
| 1920 | - | - | #197 | 0.083 | ||
| 1910 | #1701 | 0.002 | #167 | 0.109 | ||
| 1900 | #1296 | 0.002 | #180 | 0.091 | ||
| 1890 | #1323 | 0.002 | #194 | 0.082 | ||
| 1880 | #1232 | 0.001 | #300 | 0.031 | ||
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