Surname Mannus (Mannus 
, Маннус) , in the entire world, is a very rare family name. The last name Mannus is characteristic of the United Kingdom, where it is a very rare surname, South Africa, and Malaysia, where it is an extremely rare surname. In absolute terms, it most frequently occurs in the United Kingdom, South Africa, and the United States. Likewise, Mannus is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mannus | Germany, South Africa, United Kingdom, India, Netherlands |
| mannus riedesel builder in the early 18th century in the Counties of Wittgenstein and surrounding areas, DE (b. 1662) |
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| mannus morula Roman Catholic bishop |
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| mannus hendrik-jan nijland doctoral candidate at the London School of Economics and Political Science |
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| alan mannus Northern Irish footballer, GB (b. 1982) |
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