Total babies named Duff (all years): 441
| Year | Boys (count / rank / %) |
|---|---|
| 2008 | 6 / #11462 / 0.000% |
| 1976 | 5 / #5848 / 0.000% |
| 1974 | 6 / #4791 / 0.000% |
| 1973 | 7 / #4203 / 0.000% |
| 1971 | 7 / #4093 / 0.000% |
| 1970 | 11 / #2944 / 0.001% |
| 1969 | 14 / #2343 / 0.001% |
| 1968 | 6 / #3820 / 0.000% |
| 1967 | 6 / #3665 / 0.000% |
| 1966 | 10 / #2672 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 1965 | 8 / #3050 / 0.000% |
| 1964 | 14 / #2240 / 0.001% |
| 1963 | 14 / #2230 / 0.001% |
| 1962 | 14 / #2213 / 0.001% |
| 1961 | 16 / #2084 / 0.001% |
| 1960 | 15 / #2156 / 0.001% |
| 1959 | 18 / #1929 / 0.001% |
| 1958 | 13 / #2293 / 0.001% |
| 1957 | 14 / #2215 / 0.001% |
| 1956 | 31 / #1395 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 1955 | 23 / #1625 / 0.001% |
| 1954 | 34 / #1296 / 0.002% |
| 1953 | 20 / #1725 / 0.001% |
| 1952 | 11 / #2411 / 0.001% |
| 1951 | 5 / #3860 / 0.000% |
| 1950 | 8 / #2837 / 0.000% |
| 1949 | 8 / #2852 / 0.000% |
| 1948 | 8 / #2844 / 0.000% |
| 1946 | 6 / #3269 / 0.000% |
| 1943 | 6 / #3320 / 0.000% |
| Year | Boys (count / rank / %) |
|---|---|
| 1942 | 7 / #3009 / 0.001% |
| 1941 | 7 / #2952 / 0.001% |
| 1937 | 7 / #2992 / 0.001% |
| 1935 | 6 / #3357 / 0.001% |
| 1927 | 8 / #3237 / 0.001% |
| 1924 | 9 / #3082 / 0.001% |
| 1921 | 5 / #4519 / 0.000% |
| 1920 | 5 / #4473 / 0.000% |
| 1917 | 8 / #3009 / 0.001% |
| 1916 | 5 / #4082 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 1882 | 5 / #973 / 0.004% |
| 1880 | 5 / #945 / 0.005% |