Surname Roan (Roan 
, Roano 
, สีสวาด 
) , across the world, is quite a common cognomen. The cognomen Roan is habitual in Albania, where it is quite a rare surname, Mexico, where it is a rare surname, and the United States. In absolute terms, it is the most numerous in the United States, Mexico, and Philippines. Also, Roan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Roan | Syria, Mexico, United States, Egypt, Philippines |
| Roano | Mexico, Brazil, United States, South Africa, Philippines |
| สีสวาด | Thailand |
| Роан | Georgia, Ukraine, Russia |
| john roan American Presbyterian minister (b. 1716) |
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charles h. roan United States Marine Corps Medal of Honor recipient, US (b. 1923) |
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| margaret zattau roan American music therapist (1905-1975) (b. 1905) |
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| paul roan American politician, US (b. 1943) |
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| oscar roan American football player, US (b. 1951) |
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| michael roan American football player, US (b. 1972) |
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| dan roan British journalist, GB (b. 1977) |
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| john roan 17th-century landowner in Greenwich, London |
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| thomas roan Peerage person ID=459325 |
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| virgil h. roan researcher |
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| nadia r roan researcher |
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| mary ann roan (died 1781) |
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| feng-i fiona roan Taiwanese-American writer/director |
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| shi-shyr roan Ph.D. Brandeis University 1974 |
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| john roan Church of Ireland bishop |
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