Family name Romppainen (Romppainen 
) , in all the world, is a rare cognomen. The cognomen Romppainen is habitual in Finland, where it is quite a common surname, Sweden, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Romppainen | Sweden, Finland, United States |
| katariina romppainen Finnish writer, FI (b. 1964) |
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| päivi romppainen FI (b. 1961) |
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| hannu romppainen Finnish historian, FI |
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| nea romppainen Finnish association football player, FI |
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| keijo romppainen Finnish actor, FI |
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| mirja romppainen FI |
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| mika romppainen FI |
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| seppo romppainen FI |
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| juhani romppainen FI |
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| kaija romppainen FI |
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Mr, Joni, Juha, Juho, Taru, Toni, Timo, Niko, Erik, Emma, Eero, Heli, Ismo, Olli, Marie, Marja, Matti, Maire, Mavis, Meeri, Mirva, Minna, John, Jari, Lena, Ryan, Ms, Aku, Pia, Pã, Roy, Esa, Ida, Mari, Mary, Mika, Miska, Miko, Satu, Sini, Anne, Arto, Aatu, Kari, Kati, Panu, Pasi, Riku, Sami, and Mikko