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 | Netherlands, Canada, New Zealand, United States, South Africa |
|
isaac e. ditmars Canadian-American architect, US (b. 1850) |
|
| helene ditmars Dutch art collector (1822-1895), NL (b. 1822) |
|
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|
raymond ditmars American zoologist, writer, filmmaker, US (b. 1876) |
|
| hillary l ditmars researcher |
|