All around the world, Jan-Jaap (Jan-Jaap 
) is a very rare boy's forename. The first name Jan-Jaap is characteristic of Western Europe, particularly Netherlands, where it is a rare boy's name. Parts of the name also exists independently as a last name Jan, and a first name Jaap.
| VARIANT | COUNTRY |
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| Jan-Jaap | Germany, United Kingdom, Denmark, France, Netherlands |
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jan-jaap heij journalist from the Netherlands, NL (b. 1968) |
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| jan-jaap de haan Dutch politician, NL (b. 1974) |
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| jan-jaap van peperstraten catholic priest, NL (b. 1978) |
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| jan-jaap natte netherlandic ice hockey player, NL (b. 1979) |
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| jan-jaap poos researcher |
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| jan-jaap sonke Malawian politician, MW |
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| jan-jaap wesselink |
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Aue, Lamme, Tanis, Meijer, Arends, Abbink, Bakker, Riegman, Jansen, Visser, Vegter, Moerman, Schmitz, Bagerman, Bosgraaf, Boersma, Kuipers, Pothoven, Gunnink, Salentijn, Stegeman, Scholten, Lange, Klene, Sirks, Oele, Bax, Bol, Bom, Vis, Ven, Wal, Maur, Stam, Bats, Baer, Altenburg, Baar, Boon, Klei, Poot, Dijk, Loos, Eits, Haan, Heij, Vink, Veer, Berg, and Verschoor