The baby name Dyan appears in baby name data for the United States from 1957 to 1984. It was most popular in 1970 with 64 babies given the name.
In the later years of this period, Dyan has become less common than it once was.
| Year | Count |
|---|---|
| 1957 | 5 |
| 1958 | 7 |
| 1965 | 11 |
| 1966 | 22 |
| 1967 | 20 |
| 1968 | 44 |
| 1969 | 13 |
| 1970 | 64 |
| 1971 | 48 |
| 1972 | 48 |
| 1973 | 13 |
| 1974 | 22 |
| 1975 | 30 |
| 1976 | 17 |
| 1977 | 5 |
| 1978 | 14 |
| 1981 | 5 |
| 1982 | 16 |
| 1983 | 17 |
| 1984 | 10 |