Surname Groothoff (Groothoff 
) , globally, is a rare last name. The last name Groothoff is habitual in Netherlands, where it is quite a rare surname, Germany, where it is a rare surname, and Australia, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Netherlands, Germany, and the United States.
| VARIANT | COUNTRY |
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| Groothoff | Netherlands, Australia, Germany, United States |
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hugo groothoff German architect, DE (b. 1851) |
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anton groothoff (b. 1847) |
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| christiaan groothoff Dutch journalist and association football referee, NL (b. 1878) |
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| arnold groothoff (b. 1883) |
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| christiaan theodoor groothoff NL (b. 1887) |
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| hans-hermann groothoff DE (b. 1915) |
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| christaan groothoff NL (b. 1920) |
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| johan groothoff researcher (ORCID 0000-0002-6957-4358) |
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| g. groothoff |
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| marie groothoff German association football player, DE (b. 1998) |
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