Cognomen Sumampouw (Sumampouw 
) , in all the world, is quite a common family name. The family name Sumampouw is characteristic of Indonesia, where it is quite a rare surname, Netherlands, where it is a very rare surname, and Australia. Measured by absolute frequency, this name is the most popular in Indonesia, the United States, and Netherlands. Very seldom, Sumampouw is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sumampouw | Australia, United States, Netherlands, Indonesia, Malaysia |
| rudolf jafet sumampouw Indonesian politician (born 1954 in Amurang), ID (b. 1954) |
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| jeane ib sumampouw Indonesian politician (born 1964 in Manado), ID (b. 1964) |
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| nathanael e j sumampouw researcher (ORCID 0000-0002-6548-7433) |
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| jerry sumampouw ID |
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| conny sumampouw |
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Mr, John, Joan, Jody, Juan, Nael, Nita, Eric, Erna, Eron, Vega, Inoe, Ivan, Maria, Mouna, Merry, Meily, Meidy, Meyni, Mcdee, Sammy, Shela, Jany, Sisca, Lusi, Gita, Ny, Max, Roy, Eva, Ine, Oby, Alfa, Andy, Arly, Beno, Raul, Ralf, Rudy, Ryke, Deby, Dexi, Dave, Dian, Diah, Dino, Gina, Ghio, and Sonni