Popularity in the United States (by decade)
Numbers
| Cleo (feminine) | Cleo (masculine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | #714 | 0.022 | - | - | ||
| 2010 | #1587 | 0.007 | - | - | ||
| 2000 | - | - | - | - | ||
| 1990 | - | - | - | - | ||
| 1980 | - | - | - | - | ||
| 1970 | - | - | #1559 | 0.002 | ||
| 1960 | #1501 | 0.003 | #1146 | 0.002 | ||
| 1950 | #847 | 0.007 | #783 | 0.004 | ||
| 1940 | #512 | 0.015 | #567 | 0.008 | ||
| 1930 | #305 | 0.038 | #406 | 0.017 | ||
| 1920 | #226 | 0.066 | #333 | 0.026 | ||
| 1910 | #193 | 0.087 | #293 | 0.034 | ||
| 1900 | #197 | 0.079 | #308 | 0.030 | ||
| 1890 | #253 | 0.049 | #482 | 0.013 | ||
| 1880 | #338 | 0.026 | #836 | 0.004 | ||
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