Popularity in the United States (by decade)
Numbers
| Cecil (masculine) | Cecil (feminine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | #1588 | 0.006 | - | - | ||
| 2010 | #1594 | 0.005 | - | - | ||
| 2000 | #1364 | 0.005 | - | - | ||
| 1990 | #824 | 0.008 | - | - | ||
| 1980 | #513 | 0.015 | - | - | ||
| 1970 | #384 | 0.024 | - | - | ||
| 1960 | #284 | 0.038 | - | - | ||
| 1950 | #210 | 0.059 | - | - | ||
| 1940 | #153 | 0.098 | #1110 | 0.004 | ||
| 1930 | #113 | 0.152 | #780 | 0.007 | ||
| 1920 | #86 | 0.198 | #596 | 0.012 | ||
| 1910 | #80 | 0.230 | #409 | 0.021 | ||
| 1900 | #71 | 0.246 | #309 | 0.038 | ||
| 1890 | #100 | 0.147 | #284 | 0.041 | ||
| 1880 | #187 | 0.060 | #374 | 0.021 | ||
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