Popularity in the United States (by decade)
Numbers
| Foy (masculine) | Foy (feminine) | |||||
| Year | Rank | Percent Used | Rank | Percent Used | ||
| 2020 | - | - | - | - | ||
| 2010 | - | - | - | - | ||
| 2000 | - | - | - | - | ||
| 1990 | - | - | - | - | ||
| 1980 | - | - | - | - | ||
| 1970 | - | - | - | - | ||
| 1960 | - | - | - | - | ||
| 1950 | #1689 | 0.001 | - | - | ||
| 1940 | #1212 | 0.002 | - | - | ||
| 1930 | #1075 | 0.003 | - | - | ||
| 1920 | #963 | 0.005 | - | - | ||
| 1910 | #903 | 0.005 | #1954 | 0.002 | ||
| 1900 | #1115 | 0.004 | #1958 | 0.001 | ||
| 1890 | #1340 | 0.002 | - | - | ||
| 1880 | - | - | - | - | ||
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