Popularity in the United States (by decade)
Numbers
| Leonard (feminine) | Leonard (masculine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | - | - | #668 | 0.021 | ||
| 2010 | - | - | #648 | 0.020 | ||
| 2000 | - | - | #592 | 0.018 | ||
| 1990 | - | - | #383 | 0.030 | ||
| 1980 | - | - | #228 | 0.054 | ||
| 1970 | - | - | #166 | 0.092 | ||
| 1960 | - | - | #120 | 0.145 | ||
| 1950 | - | - | #88 | 0.212 | ||
| 1940 | - | - | #62 | 0.292 | ||
| 1930 | #1728 | 0.002 | #52 | 0.361 | ||
| 1920 | #1419 | 0.003 | #38 | 0.473 | ||
| 1910 | #1836 | 0.002 | #43 | 0.459 | ||
| 1900 | - | - | #50 | 0.342 | ||
| 1890 | - | - | #62 | 0.257 | ||
| 1880 | - | - | #80 | 0.182 | ||
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