Family name Landgraf (Landgraf 
, Ландграф, Landgrave) , around the globe, is a common cognomen. The cognomen Landgraf is habitual in Western Europe, particularly Germany, where it is quite a rare surname, Austria, and Switzerland. Measured by absolute frequency, the name is most common in Germany, the United States, and Brazil.
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| Landgraf | Brazil, Switzerland, Austria, United States, Germany |
| michael landgraf DE (b. 1498) |
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| simon landgraf (b. 1568) |
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| hessen-kassel, landgraf, 1633-1635 karl (1633-1635) (b. 1633) |
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| johann christoph landgraf (b. 1660) |
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| adam landgraf AT (b. 1750) |
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| gottlob landgraf (b. 1783) |
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| michael landgraf DE (b. 1801) |
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| christian wilhelm eduard landgraf (b. 1817) |
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georg landgraf German politician (1885-1933), DE (b. 1885) |
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| josef landgraf DE (b. 1843) |
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| gustav landgraf German classical philologist and teacher (1857-1932), DE (b. 1857) |
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| wilhelm landgraf (b. 1850) |
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| wilhelm landgraf (b. 1850) |
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| franz landgraf German photographer, DE (b. 1870) |
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| michael landgraf (b. 1867) |
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