Last name Hårdh (Hårdh 
) , all around the world, is a very rare family name. The surname Hårdh is habitual in Northern Europe, particularly Sweden, where it is a rare surname, and Finland.
| carl-gustaf hårdh Swedish count, military officer and county governor, SE (b. 1674) |
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| adolf hårdh Finnish painter (1807-1855), FI (b. 1807) |
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| axel august hårdh Finnish physician (b. 1840) |
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| emil hårdh Finnish translator, FI (b. 1841) |
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| rafael hårdh FI (b. 1839) |
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| carl hårdh Swedish pedagogue, SE (b. 1865) |
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| hjalmar hårdh Finnish photographer and cinematographer, FI (b. 1881) |
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| johann efraim hårdh Finnish phytopathologist, FI (b. 1917) |
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| birgitta hårdh (b. 1945) |
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| robert hårdh SE |
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