Cognomen Gallman (Gallman 
) , worldwide, is quite a rare surname. The surname Gallman is characteristic of the United States, where it is a rare surname, New Zealand, and Australia, where it is a very rare surname. Measured by absolute frequency, it is commonest in the United States, Australia, and Canada.
| VARIANT | COUNTRY |
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| Gallman | Philippines, Canada, Australia, New Zealand, United States |
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waldemar j. gallman American diplomat, US (b. 1899) |
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| robert e. gallman American economic historian, US (b. 1926) |
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wayne gallman American football running back, US (b. 1994) |
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| j. matthew gallman American educator, historian, and author (b. 1957) |
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| charlie gallman college basketball player (1954–1956) Loyola (LA) |
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| philip gallman Ph. D. Yale University 1970 |
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| william gallman college basketball player (1996–1999) South Carolina |
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| james gallman college basketball player (2010–2013) Middle Tennessee |
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| kathryn gallman researcher (ORCID 0000-0002-6183-3773) |
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| angela gallman IT |
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| karen gallman Filipino-Australian model, PH (b. 1992) |
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