Cognomen Ahlgrén (Ahlgrén 
, Альгрен) , globally, is a very rare surname. The last name Ahlgrén is characteristic of Northern Europe, particularly Finland, where it is a rare surname.
| albert ahlgrén Finnish architect, FI (b. 1861) |
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| lauri ahlgrén Finnish painter, FI (b. 1929) |
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| santeri ahlgrén Finnish politician, FI (b. 1957) |
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| maiju ahlgrén Finnish textile artist, public artist and environmental artist, FI (b. 1965) |
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| bror ahlgrén FI |
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