Last name Garthoff (Garthoff 
) , in all the world, is a rare family name. The cognomen Garthoff is habitual in Germany, where it is a rare surname, Netherlands, and the United States, where it is a very rare surname. Very seldom, Garthoff is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Garthoff | Germany, China, South Africa, United States, Netherlands |
| david heinrich garthoff DE (b. 1670) |
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bert garthoff Dutch journalist, NL (b. 1913) |
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| raymond l. garthoff American diplomat (b. 1928) |
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| roman garthoff German journalist, DE (b. 1977) |
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