Cognomen Ehrnrooth (Ehrnrooth 
) , globally, is a rare last name. The surname Ehrnrooth is characteristic of Northern Europe, particularly Finland, where it is quite a common surname, Sweden, where it is a rare surname, and Denmark. In absolute terms, this name is the most popular in Northern Europe, particularly Finland, Sweden, and the United Kingdom.
| VARIANT | COUNTRY |
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| Ehrnrooth | United Kingdom, Sweden, Finland, Spain, Denmark |
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gustaf adolf ehrnrooth Finnish-Swedish major general, FI (b. 1779) |
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| carl gustaf ehrnrooth Swedish military personnel, FI (b. 1744) |
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adelaïde ehrnrooth Finnish writer, editor (1826-1905), FI (b. 1826) |
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johan casimir ehrnrooth Finnish officer, politician and Prime Minister of Bulgaria (1833-1913), FI (b. 1833) |
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| gustaf robert ehrnrooth Finnish lieutenant general (1821-1911), FI (b. 1821) |
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ernst ehrnrooth Finnish physician and professor (1871-1950), FI (b. 1871) |
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leo ehrnrooth Finnish politician, FI (b. 1877) |
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| carl albert ehrnrooth Finnish jurist, FI (b. 1831) |
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| adolf reinhold viktor ehrnrooth FI (b. 1832) |
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| lovisa ehrnrooth FI (b. 1844) |
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adolf ehrnrooth Finland Swedish general and knight of the Mannerheim Cross, FI (b. 1905) |
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göran ehrnrooth Finnish businessperson (1905–1996), FI (b. 1905) |
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| georg casimir ehrnrooth Finnish business executive (1866–1935), FI (b. 1866) |
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| axel ehrnrooth Finnish banker (1867-1950), FI (b. 1867) |
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georg c. ehrnrooth Finnish politician, FI (b. 1926) |
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Mr, Lotta, Lynne, Jaana, Johan, Jorma, Joona, Julia, Tiina, Ninja, Ellen, Edvin, Virve, Markus, Magnus, Sophia, Sophie, Albert, Krista, Regina, Rebeca, Gustaf, Lasse, Georg, Robin, Peter, Ms, Mia, Leo, Eva, Sara, Satu, Anna, Anne, Atte, Carl, Göran, Lena, Nina, Essi, Eero, Hans, Ylva, Maria, Marie, Maire, Bernt, Kalle, Jari, and Thomas