Family name Letterman (Letterman 
, לטרמן , 莱特曼) , around the globe, is quite a rare surname. The family name Letterman is habitual in Netherlands, where it is a rare surname, the United States, and Israel. Not in comparison with a country's population, it most frequently occurs in the United States, Netherlands, and Australia.
| VARIANT | COUNTRY |
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| Letterman | Netherlands, Israel, Australia, Canada, United States |
| לטרמן | Israel |
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jonathan letterman United States Army medical officer (1824-1872), US (b. 1824) |
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william henry letterman Co-founder of Phi Kappa Psi (1832-1881), US (b. 1832) |
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| george washington letterman American botanist and botanical collector (1840 - 1913), US (b. 1840) |
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david letterman American comedian and television host, US (b. 1947) |
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evil dave letterman American actor, US (b. 1955) |
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rob letterman American film director and screenwriter, US (b. 1970) |
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| russell letterman American politician, US (b. 1933) |
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| g. gregory letterman (b. 1943) |
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| rebecca s. letterman professor |
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| karla letterman |
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