Cognomen Kalkwarf (Kalkwarf 
) , throughout the world, is a rare last name. The family name Kalkwarf is characteristic of Netherlands, where it is a rare surname, Germany, and the United States, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kalkwarf | Australia, Netherlands, Germany, United States, South Africa |
| clare kalkwarf (b. 1949) |
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| heidi j kalkwarf researcher |
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