Family name Ditmars (Ditmars 
) , worldwide, is a rare cognomen. The surname Ditmars is characteristic of Netherlands, where it is a rare surname, the United States, and Canada, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ditmars | South Africa, Netherlands, United States, Canada, New Zealand |
|
isaac e. ditmars Canadian-American architect, US (b. 1850) |
|
| helene ditmars Dutch art collector (1822-1895), NL (b. 1822) |
|
|
|
raymond ditmars American zoologist, writer, filmmaker, US (b. 1876) |
|
| hillary l ditmars researcher |
|