Cognomen Rotthier (Rotthier 
) , all around the world, is a rare surname. The surname Rotthier is characteristic of Western Europe, particularly Belgium, where it is quite a rare surname, Netherlands, where it is a rare surname, and France, where it is a very rare surname. Measured by absolute frequency, the name is most common in Belgium, France, and Egypt. Much less frequently, Rotthier is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Rotthier | China, Belgium, Egypt, France, Netherlands |
| léon rotthier Belgian painter, BE (b. 1868) |
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| philippe rotthier Belgian architect, BE (b. 1941) |
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| paul rotthier Belgian politician, BE (b. 1952) |
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| rudi rotthier Belgian writer and journalist, BE (b. 1957) |
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| lies rotthier |
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Mr, Rony, Rita, Rudi, Dirk, Gino, Leon, Lies, Jana, Jori, Juan, Theo, Nico, Nick, Nele, Eddy, Fred, Ivan, Oocéane, Mikis, Mieke, Sandy, Paul, Kris, Kena, Bert, Ms, An, Ann, Cã, Bas, Ben, Ken, Kim, Leo, Luc, Sarah, Tom, Els, Fre, Ivo, Wim, Marc, Suzy, Sven, Anne, Anja, Axel, Tim, and Shawn